a more sensitive phosphate test??

[EmilyB]

If the DI cartridge is exhausted, it will be throw back crap into the tank, I believe. My DI tests at 3ppm right now, which is really high for me, I am awaiting new DI cartridges. The water from the RO portion only measures at 5ppm. However, that is dissolved solids...someone will explain what those are I hope???

I test phosphates at source zero. Then I pollute my tank with phosphates, feeding my zoo...

So I water change a lot.

And btw, has Brad told you how to get that Berlin performing? He's the only guy who still likes them...