R/O filter help

[bobby65]

My water smells a little like chlorine and having a red slime problem since I changed my R/O filters about a month ago. I had a 5 micron Sediment Filter then a 1 micron Sediment Filter and what I though was a carbon filter but not sure. all live stock corals and fish are good just the red slime issue. all perimeter are good. so today I installed a 5 micron Purtrex Sediment Filter then a 1 micron Purtrex Sediment Filter and a 0.6 Micron MATRIKX CTO Plus Carbon Block. and a color changing DI canister. I have city water Will this be ok and was the smell that I was smelling capable of making the red slime grow.

 

[AZDesertRat]

When DI resin nears exhaustion it can put off a smell but its usually a fishy smell not a chlorine smell.
You can buy a low range chlorine test kit from Spectrapure and test your RO water to see if you are getting chlorine breakthru. With the new carbon block you should not be but you may have already damaged your RO membrane if you were getting chlorine before.
What is your tap water TDS, RO only TDS before the DI and final RO/DI TDS? Your rejection rate or difference bewteen the tap water TDS and RO only TDS should tell you a lot about membrane condition. If it has been damaged your TDS will be elevated and you may see the GPD go up due to a compromised membrane meaning the TDS is escaping through the damaged membrane fabric.

Unless you have unusual sediment problems I would scrap the 5 micron sediment filter, move the 1 micron and carbon up a position and with a couple $$ in fittings turn the empty canister into a dual DI for best bang for your buck. You don't need two sediment or carbon block filters when you use high quality, low micron replacements and you gain little if any benefit from them. Dual DI is a benefit.