compact reef flush

rainn626

Member
hey all, i have a airwaterice compact reefkeeper and i see that the filters are turning brown. do i need to flush the system and if so how?
 

scsinet

Active Member
All filters cartridges are designed to be throwaway, they aren't meant to be "resurrected" once they are depleted. RO membranes can be flushed to extend their life, but not "fixed" once they finally give up the ghost.
The filter that has likely turned is the sediment prefilter. Attempting to resurrect this filter could reduce it's performance, causing it to let large sediment particles into the RO membrane, destroying it. The RO membrane is a very expensive component, so you are better off replacing a $5 sediment filter than risking a $80 RO membrane.
Just a tip though... a light brown filter isn't a cause for alarm. You should replace it when it gets to be a "mud" or "rust" color. Light brown or slight discoloration is not an indication of depletion.
 

rainn626

Member
thank you for your help. well, its still pretty new dont use it that often, only have a 29 gal. thanks again
 

peckhead

Active Member
if you invest in a tds meter it will tell you how clean the water is and you will know when to replace your filters by checking your tds when u make fresh ro water. check that bidding site
 

scsinet

Active Member
Originally Posted by peckhead
if you invest in a tds meter it will tell you how clean the water is and you will know when to replace your filters by checking your tds when u make fresh ro water. check that bidding site
This won't help him.
Everything a sediment prefilter removes from the water the RO membrane will remove also. The sediment prefilter is there to protect the RO membrane from the easy to catch stuff, because that is also the stuff that will reduce it's life the fastest. It's a cheap filter protecting a very expensive one. Even if you remove a sediment prefilter, the TDS of the product water won't change because the RO membrane is still removing everything that the missing filter was taking out, however the membrane's life will be severely cut down. Long story short, TDS meters test the performance of the entire system, not just one cartridge.
If you rely on a TDS meter to tell you when to replace your prefilter, you'll go thorugh a lot more expensive membranes than necessary. That's why cartridge canisters are often clear... for visual interpretation.
 
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