sadly, from my experience, that is the start of brown algae, it will be brown in a few days
I know this to be true from experience. You had the beginning stage of brown algae. Zone and pithoff are only temporary fixes, and you have to re introduce these products every 3 days or the slime starts to take over again. The best thing I found was physan20 but you can't use it with plants in the system or it will mess them up. Where you using Dutch master fertilizer? That's when I got the slime in my system and the water starts to get funky... Bad funky! Can you tell us more about cch2o roots? What's the ingredients in it?
Sounds like you had something similiar but I'm 110% positive that its fallout from the ph up reaction, even GH agreed with me on this which I was surprised about. There were even small crystals forming where the water splashed up on the sides of the buckets which really odd. I put in freshwater and ran it for days with no problems at all, within 24 hrs after adding GH ph up the slime started building up, twice. I setup some side experiments with clean water, ph up, and nutrients and it did the same thing. Now that I've switched to
technaflora ph up and no more slime buildup. To be honest having slime in my system would be very surprising since I run everything so sterile. This slime appeared with pythoff, UCRoots, and zone in sterilized RO. Luckily it is easy to get it off everything, just a high pressure water hose sprayer knocks it right off.
BTW you have to add pythoff daily to keep the level high enough to constantly kill, I used the test kit to find out. I used physan in my system once and it was like a washing machine with too much soap in it, foam all across my floor! I've been using GH 3 part for a while, just wont be using the ph up anymore.
UCRoots is some kind of acid is what CC told me, that was about it. I blindly trusted them and it worked really well. Maybe CC will jump in here and let us know.
