Yeah around 4g to 1 clean gallon. That was my largest worry about setting one up then one day I saw a 300GPD unit from GreenMako and had to have it.

[quote="brewercm"]
Quote Originally Posted by bstreep



I believe those cartridges are nothing more than some sort of filter that puts stuff back into the water that you just cleaned out, I'd just like to know what it is.


I believe it to be crack cocaine. Keeps you coming back and buying more of their filters.


I found a good use for my waste water. I bought about 100' of tubing and run my discharge to my freshwater tank. I drain off about 90g of water out of the 125g and proceed to make about 30g of RO/DI (My restrictor valve is set for 3:1) and refill the freshwater tank with water that is cleaner than tap water treated with chemicals. No chemicals to add and a TDS of about 100TDS instead of the 320TDS coming from the tap. It takes about 5 hours to do it this way so there is little shock to the fish as well.