Hi everybody, I have a 2x4 flood trey with aprox 22 babies starting up. 12 r seeds and the rest r clones bout 6 to 8 inches tall. Everything started fine, only using half strength sensi grow A/B. Then just a week ago I started adding calmag and florolicious plus to equal ouit sum deficiencys. Since then I had to remove brown snotty slugde that was growing on the airstones. Now the airstones r gone brown slugde is caked on everything( res, trey, hoses, etc since this mystery sludge came on scene my ph will be balabced at 5.8 by morning its back to 7. I've tried flushing, and H202 has no effect. Can anybody help me determine a resolution and save my babies, too much time and effort to just cut ties and start over. Any help is much apprcitated. Thank u