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View Full Version : Do i need a new membrane?

MaineReef22
06/12/2011, 06:39 PM
I just won this ro unit on ebay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&_trksid=p4340.l2557&rt=nc&nma=true&item=330574573806&si=OweKQpLhhjkGnQHpI22IcRWAgZA%253D&viewitem=&sspagename=STRK%3AMEWNX%3AIT#ht_500wt_1156

Can you still use the membranes after they have been dryed out?
also did i get a good deal on this ro unit?
BrianOKC
06/12/2011, 06:47 PM
I've heard if they dry all the way out they go bad. You might wait till you get it hooked up and see what your TDS reading is before and after the membrane to see if it still works before you order a new 1.
Aviad B.Z.
06/12/2011, 06:57 PM
the best way is to check TDS or microsiemens.
disc1
06/12/2011, 07:00 PM
If it has been dry it is best to get a new one. They usually go bad or will go bad shortly after you start using it again.
MaineReef22
06/12/2011, 08:01 PM
Is this a good unit? and did i get a good deal on it?
disc1
06/12/2011, 08:07 PM
By the time you buy new filters and membrane for it, you will have spent almost as much as a new one I think.

You should also look into getting a DI stage to go with that.
sporto0
06/12/2011, 08:10 PM
i would have gone with a di filter as well, 4 stage ro
MaineReef22
06/12/2011, 08:14 PM
it comes with two new filters a carbon and sediment and i didnt want a di unit i was told it over strips the water
Toddrtrex
06/12/2011, 08:42 PM
it comes with two new filters a carbon and sediment and i didnt want a di unit i was told it over strips the water

Strips the water of what?

You wouldn't want one if you were using this for drinking water, but for water for a tank, I would make sure to have a DI unit.
disc1
06/12/2011, 08:48 PM
it comes with two new filters a carbon and sediment and i didnt want a di unit i was told it over strips the water

That is an issue for freshwater tanks. For saltwater tanks you want completely clean water. It's no worry losing the salt content because we are adding back way more salt than that when we mix up the water.

For a saltwater tank you definitely want a DI stage to make sure you don't end up with phosphates in your new water.
MaineReef22
06/12/2011, 09:30 PM
What membrane should i get? and could i find one for under $50? I only need to filter 5 gallons a week for my 10% water change.
BrianOKC
06/12/2011, 11:12 PM
I'd pay the extra few bucks for the 75 GPD that has the 98% rejection rate. You could probably get a 35 GPD for lets say $30 and a 75 GPD is like $35 so for the extra 5 dollars you can make twice the water in case of an emergency.
MaineReef22
06/13/2011, 10:31 AM
I'd pay the extra few bucks for the 75 GPD that has the 98% rejection rate. You could probably get a 35 GPD for lets say $30 and a 75 GPD is like $35 so for the extra 5 dollars you can make twice the water in case of an emergency.

Could you send me a link to these?
MaineReef22
06/13/2011, 01:45 PM
???? ^^ ????
Toddrtrex
06/13/2011, 01:48 PM
8th one down (http://www.buckeyefieldsupply.com/showproducts.asp?Category=225&Sub=153)