so, I have an issue going on. three of my sponges have greatly lost color and look very unhealthy. I have had two issues going on, one being that the stock fluval light has been burnt out for almost a month now. I didn't think anything in this tank would care about it, especially the sponges. the other issue is a couple days ago the heater went nuts. found the tank at 87. no loses, except the basket star has not fully opened since then.
I transferred the suffering sponges into my reef tank, which has a functional light and a solid temp. here, you can compare the two sponges to the obvious bright healthy red one. that one has been in my reef tank. the one directly behind it is a cutting of the same sponge, just from the NPS tank. you can compare the orange sponge to how vibrant it looks in the other pictures as well. the small red tree sponge has been "transplanted" as well.
the small yellow frilly sponges and blue sponge seem fine so I'll keep them in this tank for now.
tomorrow, I am swapping the tank. ): my boyfriend accidentally cracked the corner of this one (it still holds water thank god) but I found a used black fluval edge 6g for $20. the light works so at least now there will be something. within a month I will upgrade to the fully controllable 18W LED hood.
any thoughts on my sponges? never had a problem with them before. the orange tree sponge I've had for almost 6 months now, it was originally in my reef tank and doing great. could they be photosynthetic? or just sensitive to temperature?