Unresolved Small snails? and white stuff growing on rocks

Hey ya'll. Just ordered my chiller (over $500... oahhh) which should arrive tomorrow or thursday. Since the temperatures here in Spain reach over 86F, my tank has been overheating (up to 84F) and therefore I lost 4 fish and a couple of corals. You can see the one coral looking pretty bad, however it always recovers at night/in the evening.
My question is about this white stuff growing on the rocks and the many (about 15) little snails that have appeared. Anybody knows what this is and whether the snails are harmless or a result of my snails breeding?
I would really appreciate any input

 

Sorry, for some reason the pics don't upload. I will try again.

 

Snails and white stuff growing on my rocks

Here they are....

 

do a search for stomatella snails. that is usually what comes on my rocks. Do you not have AC?

 

yes, stomatella. The white things are probably some kind of sponge.

 

i have heard people call them sphagetti sponges. i also see a couple that look to be pineapple sponges.

 

Thanks a lot... did the research and they do look like stometella snails. They don't seem do to any harm, so should I keep them or remove them? And currently I don't have an AC but will get my chiller tomorrow .... thank GOD, 'cause I lost 4 of 5 fish and a couple of courals due to overheating.
Besides that, I might be moving again... this time from the island of Mallorca to mainland Spain. So, I will wait for everything to settle before adding anymore lifestock.
Thanks for your replies

 

+1 on Stomatella. They're somewhat prolific breeders, so if your snails were breeding, these guys would be too.

They're good snails. They'll breed only to the point where there's enough food for them to eat, so they round out a CUC pretty well if they're not being hunted by shrimp or crabs.

 

Sponges

Are they harmless or should I try to get rid of them and if how?

 

Snails

How big do they get?