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If anyone is still reading this, or if anyone comes across this later and finds themselves struggling with Pythium, I have finally determined the very, very simple steps to prevent it. 1: Use water that has been UV-filtered. Stores that sell RO water that you can fill reusable jugs with always...

The stuff in the water is 10 seconds after adding some 29% h2o2. I think this stuff is coming in from my air pump, so through the air. It's also in my plant's netpot of hydroton rocks now, too.

...I don't even. Okay, I need to find out what this is before I can properly fight it.

Also: I also agree, absolutely no Hygrozyme. That stuff's terrible. Complezym, however, is fantastic for root growth, and no negative effects! At least none yet that I've seen, and...well, so far, I think I've seen all the major issues that can crop up in the water. Good reason to consider...

Well, so far what seems to work best is washing the container with physan 20 solution, boiling the airstones for about 5-10 minutes, soaking them 30 minutes in physan 20 solution, bubbling them for 30 minutes in it, and then adding the water (RO really is best), cali-mag, nutes, h202 (just for...

Quick update. I made a dilution of Physan 20 and warm water to clean the interior of the tent with, and on a lark, I decided to maybe do the same with the big plant. I emptied the hydroton into the solution, and removed the plug. Unlike prior instances of cyanobacterial infestation, there was...

Well. This stuff? Holy crap. Just. Holy CRAP. What does it TAKE, man?? So. With 2 tsp. of Physan 20 in both of my 5gal bubblebuckets after having scrubbed and thoroughly washed everything from the inside of the tent to the buckets to the airstones to the tubes, lids, everything. Turning...

See that white crap? If after draining your reservoirs you see that weird stuff, you are NOT seeing sodium deposits; you are seeing cyanobacteria cultures. That's how you know.

Yeah, they do photosynthesize, but in the absence of light, they can use carbon and/or glucose in the environment for energy, and since carbon's pretty prevalent in most water sources, it can (and will) feed on that in greater quantities when deprived of light. I wish I'd gone to school for...

Take in mind, all of what I'm saying is, at least for now, speculation, supplemented with me frantically searching forums for possible diagnoses and treatments. But if it works, hopefully this'll help serve others with this same problem, because this stuff seems to have earned its nickname of...

Actually, cyanobacteria are not actually an algae, they're a...well, bacteria. They can actually survive and thrive in pitch-black conditions. They don't need to photosynthesize, see. BUT, light WILL accelerate their growth. I suspect the reason why you are having the issues in cloning trays...

Its source is clearly the tap water. Unfortunately, through exposure, it has colonized the interior of my tent, airtones, and probably my air-pump too just for good measure because cyanos are sadistic little $h17$ like that, apparently. This stuff grows in total darkness, in tap water that has...

Hey guys, it's been a while. Well. More failures after failures. However, through process of deduction, I have to realize what the source of my woes is. Hydro herpes. AKA, cyanobacteria.

I didn't realize that this thread received so many replies suddenly, I've been kind of out of it. I'll make my reply as succinct as possible to address as many pertinent points as I can. I've been using 29% hydropero (I use Nutrilife Plant Products brand), and hydroguard at...

Okay so I'm a first-timer. Growing some AK-47 and some White Widow. My setup is a basic DWC bubbler system. 25-gallon bin with a tray with holes cut in it for net pots, two airstones, 600 watt Mars Hydro LED light, 6" inline fan with filter (my place is dusty and mold is present somewhere)...