Anybody had problems with sponges
 

I bought a blue sponge at the local fishstore on friday. I noticed the odd dead spot on it Sunday/Monday. Yesterday i went home from work and the sponge was half yellow. My hammer and frogspawn coral were shriveled up, my colt coral looked awful, my three rose bubble tips were shrunk up and were moving all over the place.

Is it possible for a sponge to cause a "wipeout" episode on a tank?

Is the best remedy to perform a large scale water change (20g new water into a 90g tank)?

Please let me know what you think.

DanTheMan

I definitely think it is a possibility. Both times my tank semi-crashed was around the same time I bought an orange finger sponge. In both cases, when the sponge started dying, the tank started crashing mysteriously.

Short answer is yes, it is time for several major water change. Sponges are very hard to keep in our tanks because the air bubbles in our tanks kill sponges (that's why a dead spot was formed). Sponges and air don't mix.

- Victor.