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Old 10-24-2003, 12:57 PM   #1
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RO membrane question

Does anyone have a general feel for how many gallons can be pulled from the typical RO membrane before it is replaced? I’m curious about all the types, TFC, CTA or High Removal, but if anyone has experience with any one of these I’d be thrilled for the info.


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Old 10-24-2003, 03:02 PM   #2
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I think some of this has to do with the quality of the water that your running thru the RO membrane. Our sponsor AquaFX might be able to give you a rough guideline based upon his experences.

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Old 10-26-2003, 04:28 PM   #3
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i have noticed that 500gal in my area is a good time. you can get more with a flusing of the unit every 100gals, corallife says 1,000 gal with flushing the unit. this means reversing the red [wastewater] and the blue [ro water] every 100 gal for 15min. then putting the hoses back to where they were. my membrain cost 75.00 so i flush every 100 gal. i have 750gal on my membrain now, still no nitrates,phos or anything else.
75gal oceanic with 20 gal refugium, 750g.p.h.pump for HSA-250 skimmer, EHEIM-1250 PUMP FOR 200gph mincal. calcium reactor with 20lb co2 tank and co2 regulator with solenoid, 800G.P.H. overflow box pump and filter, aquaclearl 500 power filter for circulation and carbon use only,wave maker 900, 3x300g.p.h., pinpoint ph controller, delta star 1/3hp chiller.with 600g.p.h. pump, spectrapure automatic liquid level controller for the addition of ro.di.top off water, kent marine 4 stage delux maxxima 35g.p.d. hi-s, t.d.s. monitor, flush kit, 170lbs live rock, 5in sand bed, acropora's LG green,pink, and med purple, LG montipora encrusting purple, LG porities coral yellow, LG ruffled ridge coral, LG starburst coral green, green hairy mushrooms 100+, blue mushrooms, red mush, fluorescent green mush,green striped mush, bubble coral, LG finger leather and 2in baby, green ricordia mush, in refugium halimeda plant, caulerpa, and lot's of bug's. 1 purple tang, male and female percular clown's, 1 yellow wrasse
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