I have a black long spined urchin, it used to be in my 30 gal tank but after 2 months the puffer aquired a taste for it and so quickly I moved it to my spare first aid 10 gal tank, and its been sitting there for another 2 months, it grew its spines back and became huge! each spine was about 4 inches long. Yesterday I bought a small Fluval-1plus so the urchin would get some water current (before it had just the standard bubbly box filter). This morning i went to the aquarium and the urchin shed/lost about 3/4 of its spines, I mean the bottom is littered with them and it has maybe like 20 - 30 of them left.
I checked the water, salt 1.023 on the dot, Ammonia 0, Nitrate 0, Nitrite less than 5, Ph 7.9 - 8.0 (yeah its kinda low but its always been like that). And the zebra thats swimming with the urchin acts normal. Temperature is steady on 78-79 F I always had a good expensive heater inthere.
Suggestions???
I checked the water, salt 1.023 on the dot, Ammonia 0, Nitrate 0, Nitrite less than 5, Ph 7.9 - 8.0 (yeah its kinda low but its always been like that). And the zebra thats swimming with the urchin acts normal. Temperature is steady on 78-79 F I always had a good expensive heater inthere.
Suggestions???