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View Full Version : ebay ro/di filtration system

mitchwelt
10/27/2007, 02:20 PM
got a set of filters on ebay for about 50 bucks came with a filmtek 75gpd ro membrance and a set of other filters, hooked up and tds is at a big ZERO.

why do people say these filters are not good and so on if i a m getting 0 tds?
my last set got off ebay lasted 2 years at 0 tds...
ihopss
10/27/2007, 03:52 PM
If you or getting O TDS on a R/O I would check your meter,
95accord
10/27/2007, 04:27 PM
not ALL ebay crap is bad....some stuff is a good deal. good score if it works
krowleey
10/27/2007, 05:12 PM
nobody said those were bad since you mentioned you got a "filmtek" membrane. and i also believe pureh20 sells units on ebay as well. but think again if you think you will get a good unit on ebay for under 100 bucks.as for the zero tds after ro, i myself get zero after my ro but my tap water has a tds of 55 out of the tap, so there you have it.
95accord
10/27/2007, 07:08 PM
in the end....you get what you pay for.
shyland83
10/27/2007, 07:56 PM
if he actually got 2 years out of it with zero TDS how could you claim you get what you pay for? it seems he paid less and got more.
mitchwelt
10/27/2007, 08:04 PM
<a href=showthread.php?s=&postid=11066071#post11066071 target=_blank>Originally posted</a> by shyland83
if he actually got 2 years out of it with zero TDS how could you claim you get what you pay for? it seems he paid less and got more.

yeah, the tds on my tap water is only 150 before ro/di, but 2 years is pretty good for 50 bucks worth of filters...
poppin_fresh
10/27/2007, 08:38 PM
I have 2 Ebay units, an Aquasafe systems and a Filters Direct units. So far they have been fine. The only thing I haven't been fond of is the horizontal DI canister.
mitchwelt
10/27/2007, 09:23 PM
<a href=showthread.php?s=&postid=11066307#post11066307 target=_blank>Originally posted</a> by poppin_fresh
I have 2 Ebay units, an Aquasafe systems and a Filters Direct units. So far they have been fine. The only thing I haven't been fond of is the horizontal DI canister.

whats wrong with the horizontal di filter?
poppin_fresh
10/27/2007, 09:33 PM
tends to let the media settle on the bottom, while the un-DI water flows over the top of it.
werdlone
10/27/2007, 10:59 PM
So what is the best RO membrane to get? I think the cannisters are universal size, so can I upgrade my cheap ebay unit with a good RO membrane?
reef_doug
10/27/2007, 11:14 PM
The Dow Filmtec 60 or 75 GPD w/ 98% rejection is very popular with the better units. Some inexpensive ebay filters may use "seconds or inferior membranes." You want to protect the membrane with a good carbon block filter, like a Matrix filter down to .5 microns. A sediment filter of 1 micron is usually good infront of carbon block.
Reefgeek.com, two part solutions, and thefilterguys.biz are a few that have some good quality filters & membranes at good prices. Spectrapure.com has the best selection of DI cartridges.

Other than that, the shells and membrane housings are all universal, really not much to them.