what are you checking your ph with Duck? what are you using to balance the ph? brand?
looks like your ph is off.
i got a problem with one bucket over here. my ph is swinging like mad. new growth each day, but ph will be 5.8 at night, then 3.6 next morning??? can't figure this one out. gonna change them all out again today...
another tip. get some black tubing. i was using the clear, and found slime frequently. i got mine at walmart cheap for a big roll...
sorry to hear of the loss of the spacecase...aarrgghhhh...