I think ur prob is from using tap water and not di water.
Those looks like an infestation of hair algae, nitrates and phosphates probably sky high that's why ur mushrooms don't look good.
Ur using api test kits? Pretty sure the salifert ones would give u a sky high reading.
Restart properly, and use di water.
Purple mushrooms on rock $35
Green mushrooms on rock $30
2 inch Crocea clam, (a few bleached spots, but recovering) $30
FCFS, Whatsapp or SMS.
Cheers
Adam
91150045