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This is quite a bit bigger than an asterina. Has 4 legs. Any ideas? Sent from my iPhone using Aquarium Advice

Can you help identify what kind of birdsnest this is exactly?

I realize that a green slimer is an acropora but I have two different types of acropora that were both given to me and both were given claiming to be green slimers. The smaller one is hard to see in the picture but you can clearly see the other. Any ideas what acropora these are exactly?

Anybody know what kind of coral this is? It encrusts like an sps, but has eyes or polyps like an lps or chalice.

Any idea what brand/make/model this skimmer is?

I am setting up a 90 gallon reef ready tank with this ADHI 30 gallon sump/refugium (ADHI Model 30 Refugium - FREE GROUND SHIPPING!* :: ADHI :: Sumps :: Champion Lighting & Supply). From what I have heard, the overflow gph rate on the reef ready tank is right at 700 or so. With that, I have two...

Any help id'ing this? Looks almost like white zoanthids but the growth looks different.

Anybody have an ID on this Birdsnest coral? My best guess is a ponape birds nest but this doesn't have the pink tips. I've been told "bright green" but that doesn't seem right.

I just happened to see this today. This pic is the best I can get a this was taken from the back of the tank. Is it a sponge? What's up with the hole?

I recently moved my tank from one room of my house to another. All of the corals did fine except one colony of purple montipora digitata. Ironically I have two colonies, one larger and one smaller frag that was originally a part of the larger colony. Ever since the move the larger colony browned...

Definitely not a coral or fish, but I'm wondering if you could help ID the brand of this 55 gallon tank. I want to drill it, don't have polarized glasses, and can't see a brand. Looks like it was built in 2004. I want to drill the back, not the bottom as I'm assuming that is tempered. Any help?

I am working on transferring my 37 gallon reef to a 55 gallon. I bought some used stuff from a guy who had a 55 gallon. included was a 9.5 mag drive pump and a sump that he built himself. I have attached the picture of the sump to this post for you to see. He ran it a bit different than I want...

I have to give props to marineland. I have an older version of the reef capable led light. Recently I noticed that the switch wouldn't work to turn on just the blue lights. This light is not new. In fact it's probably close to 6 years old. After calling marineland and spending no more than 3...

I am looking to add a 10 gallon sump to my 37 gallon reef. I won't be able to drill the tank so I'm looking at an overflow box. I've seen cpr, rapids pro, lifereef, and eshopps overflow boxes. I'm leaning toward eshopps because of cost. For a 37 gallon tank and 10 gallon sump what size...

Help me think through something. Every day I happen to see something weird happen. For the first couple hours of the day everything typical looks good. The zoas are all open and everything is expanding. Then about 2-3 hours after all the lights are on I notice that everything at once tends to...

Take a look at the pictures that I have attached. The xenia is obviously growing like a weed and I know that it is peaceful in that it won't sting but I also know the hammer coral is pretty aggressive. My hope in putting the xenia where it is is that it will grow around the hammer and that the...

I had to share this picture of this massive bubble algae. This stuff drives me crazy!!

I have been wanting to write up this post for a while but I didn't want to write it prematurely. I inherited my Father's saltwater setup back in April. I had a freshwater community tank before my dad gave me his equipment. While he didn't give me everything, he gave me a HOB filter...

This post isn't to ask a question but to give some information. I found what I was convinced was a dead emerald crab. It looked so complete that I was sure it was dead. It had its hairy legs, its claws, and what I thought were its eyes. I could only find one emerald crab in the tank even though...

Check out the base of my birdsnest coral. I just added it a week ago. I took this picture Sunday and little has changed since then. The polyps on the rest of it are great. Is this bleaching at the base how they die or is it still healing from being fragged since it was just fragged a week ago?

Hey guys can you help me identify these. Obviously two types of birdsnest. Which one exactly? What gorgonian is this exactly? Photosynthetic?

So I'm torn as to what to put next in my 37 gallon reef tank. In addition to my cuc and coral I have 2 mating clowns and 1 royal gramma. I'm going back and forth on what to get. I would like fish with color and personality. I'd love to get something sort of unique so I thought of a puffer but...

I'm wondering if the way in which anemones open up says anything about their health. I have had this bubble tip (I believe it is bubble tip right?) for about a month now and it hasn't moved much at all. It seems very happy and healthy. I figure this may not indicate anything at all but you can...

I have had this shrimp for a little while and I just happened to read that this may not be a peppermint shrimp but may be a camel shrimp which is not reef safe. I know the picture isn't great but the guy never comes out. From what I have read an what I am seeing I do think he is a camel shrimp...

Any idea what this stringy looking web stuff is on my zoanthids? It is hard to see in the pictures but there are close to a dozen strings coming out.