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My filter just died, the protein skimmer is still working. How long do I have before the fish, anemone, shrimp and coral start to suffer?

I have metal halide lights that are 130 PAR at 12 inches (but the clam would be at about 16 inches (I don't know how many PAR that would be. Does anybody know?

I have had a long-tentacle toadstool leather (I think). I've had it for a couple of weeks and it has looked like its doing really well (tentacles always extended) but today I noticed one small part of it has gotten dark brown and lost tentacles. I assume that part is dying? Should I cut it off...

I have a tiny little orange mushroom that I bought a week attached to a 'frag rock stem thing'....I don't know what you call those....today it had detached and I found it a couple inches away upside down. Is it possible to reattach it? Is there a special kind of glue that is used? I don't want...

Here is some kind of silver bubbly blob thing about 1/2 cm long and a few millimeters wide sticking out of the top of my Kenya tree. Any idea what it could be? There was some kind of 'pod' there when I bought it but it has morphed into this silver blob thing. The Kenya tree has been fine, I've...

I just got some LED lights that will be 130 par at 12 inches....what kind of corals could I get with that?

Three days ago I bought a dottyback pseudochromis and ever simce my yellow tailed blue damsel has been 'hiding' at the very top of the tank in the corner. She just hovers there all day! I figure she is scared of/bullied by the pseudochromis (I had thought she'd be fine bc I know blue damsels can...

So I've read that I should use a gravel vacuum and that I shouldn't. My 5 week old tank has high nitrite and high ammonia 2.0 ppm for both (after two water changes today!) From reading it seems that not having used a gravel vacuum yet could be the problem? But I've also read not to use them if...

Ok since my power flickered, here's a question! What do people do during a power outage?

I got a Bubble tip anemone a few days ago and he seemed to be doing fine but he had been slowly inching his way over to a crevice between two rocks and now has squeezed himself in and has been half closed all day? Should I be worried....and do anything? Water parameters are all fine except...

Hi! I'm new to this site and also to reef aquariums. I just started my first reef tank, 30 gallons. I currently have live rock, two occelaris clown fish, a coral banded shrimp and a bubble anemone. Last week I added a yellow tailed blue damsel fish....and later read that those fish should be...