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Ro di system

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Ro di system for sale on largest auction and classifieds sites

Home / Air Filters / Ro di system refurbished & used for sale | For Sale USA
Blue dragon xtreme pure - dragon,

Blue dragon xtreme pure - dragon,

$1046.50
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Liquagen 200 gpd stage di - liquagen,

Liquagen 200 gpd stage di - liquagen,

$229.99
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Liquagen stage 150 gpd - liquagen, ro/di

Liquagen stage 150 gpd - liquagen, ro/di

$189.99
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Aquarium reef coral reverse - coral,

Aquarium reef coral reverse - coral,

$178.00
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Aquarium reverse osmosis - reverse,

Aquarium reverse osmosis - reverse,

$125.35
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Reverse osmosis - reverse,

Reverse osmosis - reverse,

$160.00
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Aquatic life classic 100 - classic, gpd

Aquatic life classic 100 - classic, gpd

$123.49
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Reverse osmosis - reverse,

Reverse osmosis - reverse,

$90.00
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Stage aquarium reef reverse - aquarium,

Stage aquarium reef reverse - aquarium,

$204.99
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Stage aquarium reef reverse - stage,

Stage aquarium reef reverse - stage,

$119.99
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Reef aquarium reverse - aquarium,

Reef aquarium reverse - aquarium,

$139.95
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Made usa stage - made,

Made usa stage - made,

$150.00
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Stage aquarium reef reverse - aquarium,

Stage aquarium reef reverse - aquarium,

$115.00
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Liquagen stage deluxe 150 - liquagen,

Liquagen stage deluxe 150 - liquagen,

$249.99
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Liquagen gpd stage ro di - liquagen,

Liquagen gpd stage ro di - liquagen,

$159.00
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Liquagen maestro stage 150 - liquagen,

Liquagen maestro stage 150 - liquagen,

$219.99
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Bulk reef supply stage - 6,

Bulk reef supply stage - 6,

$60.00
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Liquagen stage genesis di - liquagen, ro/di

Liquagen stage genesis di - liquagen, ro/di

$155.55
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Stage reverse osmosis - 3/4/5/6,

Stage reverse osmosis - 3/4/5/6,

$29.96
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Aquarium reef koolermax - aquarium,

Aquarium reef koolermax - aquarium,

$199.99
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Aquarium water filter - ro,

Aquarium water filter - ro,

$122.99
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Stage aquarium reef 100 - aquarium, |

Stage aquarium reef 100 - aquarium, |

$179.95
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3pc water filter housings - water,

3pc water filter housings - water,

$35.99
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Aquarium reverse osmosis - aquarium,

Aquarium reverse osmosis - aquarium,

$160.00
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Liquagen stage di - liquagen, ro/di

Liquagen stage di - liquagen, ro/di

$99.99
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Liquagen stage 100 gpd di - liquagen,

Liquagen stage 100 gpd di - liquagen,

$174.49
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Aquatec cdp 6800 - aquatec,

Aquatec cdp 6800 - aquatec,

$73.80
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150 gpd membrane reverse - 150,

150 gpd membrane reverse - 150,

$34.80
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100gpd reverse osmosis - ro/di,

100gpd reverse osmosis - ro/di,

$262.39
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Liquagen stage premium 150 - premium,

Liquagen stage premium 150 - premium,

$274.99
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Liquagen stage 150 gpd - stage,

Liquagen stage 150 gpd - stage,

$259.99
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Aquafx barracuda glacial 100 - aquafx,

Aquafx barracuda glacial 100 - aquafx,

$218.99
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Stage 50 75 100 - 3/4/5/6, 50/75/100/150g

Stage 50 75 100 - 3/4/5/6, 50/75/100/150g

$37.61
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Aquatic life buddie - ro, 4-stage

Aquatic life buddie - ro, 4-stage

$95.62
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Geekpure stage reverse - geekpure,

Geekpure stage reverse - geekpure,

$135.99
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Stage bulk reef supply - stage, pro

Stage bulk reef supply - stage, pro

$237.00
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Stage 75gpd portable - stage,

Stage 75gpd portable - stage,

$119.00
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Max water stage 100gpd - max,

Max water stage 100gpd - max,

$147.20
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Liquagen stage 150 gpd - 6, ro/di

Liquagen stage 150 gpd - 6, ro/di

$229.99
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Reverse osmosis - reverse,

Reverse osmosis - reverse,

$165.68
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Liquagen stage ultra premium - 6, ultra-premium

Liquagen stage ultra premium - 6, ultra-premium

$284.00
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100 gallon reverse - gallon,

100 gallon reverse - gallon,

$55.00
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Gpd membrane reverse - 50,

Gpd membrane reverse - 50,

$12.99
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Stage reverse - 3-stage,

Stage reverse - 3-stage,

$34.19
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Stages gpd aquarium - 50,

Stages gpd aquarium - 50,

$180.00
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Pack gpd ro membrane - pack,

Pack gpd ro membrane - pack,

$77.91
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Buddie stage aquarium - ro, 4-stage

Buddie stage aquarium - ro, 4-stage

$100.91
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Garden laundry hose adapter - hose,

Garden laundry hose adapter - hose,

$17.99
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Liquagen single stage - liquagen,

Liquagen single stage - liquagen,

$49.99
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100 gpd membrane reverse - gpd,

100 gpd membrane reverse - gpd,

$26.96
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Gpd membrane reverse - gpd,

Gpd membrane reverse - gpd,

$13.99
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Buddie stage aquarium - buddie,

Buddie stage aquarium - buddie,

$75.99
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Stage reverse osmosis di - stage, ro/di

Stage reverse osmosis di - stage, ro/di

$175.00
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Stage portable reverse - 5-stage,

Stage portable reverse - 5-stage,

$149.00
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Geekpure stage portable - 4,

Geekpure stage portable - 4,

$59.99
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Aquafx barracuda glacial 100 - barracuda,

Aquafx barracuda glacial 100 - barracuda,

$128.00
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Reverse osmosis rodi - reverse,

Reverse osmosis rodi - reverse,

$149.99
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Geekpure stage portable - geekpure,

Geekpure stage portable - geekpure,

$57.99
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Stage aquarium reef reverse - stage,

Stage aquarium reef reverse - stage,

$160.69
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Stage aquarium reef reverse - 5,

Stage aquarium reef reverse - 5,

$135.00
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Pack shut off float - 2, valve

Pack shut off float - 2, valve

$18.50
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Aquarium reef reverse osmosis - aquarium,

Aquarium reef reverse osmosis - aquarium,

$145.99
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Pack 100 150 gpd membrane - 6, 100/150

Pack 100 150 gpd membrane - 6, 100/150

$52.94
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Watergeneral ro system - ro,

Watergeneral ro system - ro,

$49.00
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Aquarium reef coral reverse - reef,

Aquarium reef coral reverse - reef,

$178.00
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Inline filter set for - inline,

Inline filter set for - inline,

$49.99
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Booster pump kit for - kit,

Booster pump kit for - kit,

$149.99
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Premier aquarium reef - 75, gpd

Premier aquarium reef - 75, gpd

$128.25
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Premier stage di aquarium - 7, ro/di

Premier stage di aquarium - 7, ro/di

$162.99
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Stage water filter 100 - water,

Stage water filter 100 - water,

$186.99
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Liquagen rodi stage - liquagen,

Liquagen rodi stage - liquagen,

$49.99
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Dual outlet 150 gpd di - dual,

Dual outlet 150 gpd di - dual,

$188.99
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Aquarium reef reverse osmosis - reef,

Aquarium reef reverse osmosis - reef,

$158.99
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Made usa stage - made,

Made usa stage - made,

$150.00
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Buddie stage aquarium - buddie, 4-stage

Buddie stage aquarium - buddie, 4-stage

$105.75
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Stage reverse osmosis system - reverse,

Stage reverse osmosis system - reverse,

$35.99
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Clear filter housing - clear, 10"

Clear filter housing - clear, 10"

$26.50
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Sediment water filters smart - sediment,

Sediment water filters smart - sediment,

$16.99
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Liquagen stage rodi filter - liquagen, 5

Liquagen stage rodi filter - liquagen, 5

$49.99
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Aquaticlife aquarium stage - aquaticlife, 4-stage

Aquaticlife aquarium stage - aquaticlife, 4-stage

$60.00
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Stages gpd aquarium - 6,

Stages gpd aquarium - 6,

$180.00
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Stage reverse osmosis - reverse, rodi

Stage reverse osmosis - reverse, rodi

$68.99
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Aquarium reef reverse osmosis - aquarium,

Aquarium reef reverse osmosis - aquarium,

$149.99
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Aquarium reef koolermax - reef,

Aquarium reef koolermax - reef,

$205.00
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Stage 0ppm ro di - |, aquarium

Stage 0ppm ro di - |, aquarium

$195.95
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Ecoviva countertop reverse - ecoviva,

Ecoviva countertop reverse - ecoviva,

$189.90
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Stage 100 150 gpd - stage,

Stage 100 150 gpd - stage,

$31.96
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Stage reverse osmosis system - 4,

Stage reverse osmosis system - 4,

$30.99
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Aquafx barracuda water - aquafx, ro/di

Aquafx barracuda water - aquafx, ro/di

$129.99
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Stage 36 gpd - stage, ro

Stage 36 gpd - stage, ro

$33.96
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Stage commercial gpd - 6, 50

Stage commercial gpd - 6, 50

$399.99
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Resin filter clear - resin,

Resin filter clear - resin,

$29.00
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Stage system replacement - stage, ro

Stage system replacement - stage, ro

$114.90
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100 gpd reverse - gpd, osmosis

100 gpd reverse - gpd, osmosis

$24.20
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Liquagen color changing mixed - liquagen,

Liquagen color changing mixed - liquagen,

$369.99
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Aquatic life buddie stage - ro, 4-stage

Aquatic life buddie stage - ro, 4-stage

$119.99
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📊96 listings · from $12.99 · avg $137.5

Browse 96 ro di system listings currently in our index. Prices range from $12.99 to $1046.5, with an average of $137.5. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about ro di system →

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Everything you need to know about ro di system

Whether you are looking for a brand-new or second-hand ro di system, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at $12.99, while premium listings can reach $1046.5 — giving you a wide budget spread to work with. The average price of $137.5 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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