CPD tank where the val is green and behaving relatively normally for that tank, it took 3 drops to turn the test from blue to orange/yellow. In comparison the crypts never did well in here and I moved them all out. In the loach tank where it's browning took 4 drops and the crypts are consistently alright. I wonder if I should give up on val in the loach tank, it's always struggled. Do you think the brown val will perk up if I move it to a better condition or is it likely finished? Funnily enough the leaf structure and the whole thing seems to be intact, not rotting etc, still trying to put out runners.
I think I've had cobwebs before, and there also seems to be a sort of white blob on the back wall that looks like underwater mould. It has cleared up in the past, I may just wait it out and see what happens, and do some water swapping. Thanks for the tips.