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My plating montipora has white bubbles at the rim. I also see this on my purple stylo. It is a white fleshy growth. Instead of building skeleton. It looks soft with an air pocket. What is it?

I have Plating Montipora and Meteor Shower Cyphastrea growing on the back panel(plastic). If I break down the tank, will this come off in large pieces? Pls. Advise.

If you have media tumbling in a reactor, wouldn't the constant surface abrasion of the media particle lead to the release of chemicals back into the water?

There is brown algae growing all over my rocks. Actually, there seems more of them growing around the zoas threatening to engulf the smaller polyps. It is brown cocoa powder-like. It can be scrubbed off the rocks but it turns into little balls. My phosphates are zero(API) and I barely feed the...

I have somehow convinced myself that this is a desirable organism to have. However, it also is a source of organic particulate matter that eventually floats around my tank when I mess with the sump compartments. Should I take a bottle brush and scrub that section clean? It is going to make a...

I was turkey basting a cave in my rockwork when this thing came out. * I really like the growth form and hope it can grow in a shaded area of my tank. * The tips have noticeably bent towards the light since I took the pic. It may be photosynthetic. * What sponge grows without a natural anchor...

Probably an Acropora. Neon Yellow or pastel blue. Perhaps, both. What are the choices? Preferably, no green in them. Thanks.

Obviously, too much PAR can be a negative. Yet, I come across these web posts of growing corals at very high PAR 500+ at the top. Strangely, in a mixed tank. What allows for this? I think it is more than simply the requirements of the coral species. Something that is the province of ULNS...

You guys have been on point so far. How about these? I used to think it was retracted polyps after feeding. Not sure anymore. It looks like an anarchy tatoo just under the polyps. Thanks.

Note the red circled area on the rock. Intitially, I thought it was a sponge. It is a black mound with white tip. I tried to pick at it with a finger nail, but it won't come loose. It forms mucus nets which is not a bother to me since these nets get loaded with food and then gets tangled on...

Not exactly reef related. I would like to replace the bulb of a table lamp with an LED bulb. It has a two-stage knob that takes it from low to high. Do i have to use a dimmable LED bulb? Thanks.

It might be common knowledge to all, but I thought I would report the observation. I thought it was my imagination, but my Hammer is extending (select) tentacles during high flow periods and against the current just so that he keeps his tentacles on his frogspawn girlfriend. So, keep your...

Has anybody has seen a chemical study on what accumulates in filter media such as socks and sponges? Thank You.

I may be wrong in calling it a sponge It could be crystalline. Here goes: When you break a piece of live rock, it is often times white in the center because of calcified life forms which built up the rock. Some live rock will have a bluish color inside. Looks like a soap stain. What is that...

I have these Psychfriggindelic zoas that are exhibiting the following behavior (see pic). What is the cause of that convex shape? The enlarged mouth is something new. They do revert back to being flat like the one on the left. Btw, the concavity is most extreme during feeding times and when...

Obviously, we like that our corals have a feeding response. I run a mixed tank. Torch corals always respond, obviously. I spot feed with a pipette. Let me make analogies: If I "dust" the corals, like blowing a puff of smoke, they do not respond. But if I bury them in slurry (about .05-.1 ml mix...

Any zeolite users sans additives? I can't shake the feeling that it's a bunch of hokey. Mulm in a reactor is essentially denitrifying bacteria. Same as you would accumulate on any mechanical filter/media. Shaking the mulm just redistributes the bacteria in the system mechanically. However...

I was wondering what would be the replacement for the venerable Magnum canister. My interest is that you could use it as a diatom filter by coating the filter cartridge. An RO canister is a possibility and micron cartridges are readily available. But I don't know how to get around the width of...

The 10:1 or 20:1 guidelines are rather rigid. And, I have read up on the 3 types of flow. Do you guys ever set a time of day to run the wavemakers balls out (short of a sandstorm)? Seems like a very purgative moment for the tank. Seems an hour or two a day prevents rock dandruff/detritus build...

I decided to get back to the aquarium hobby after a long layover. AIO tanks are a new concept to me and I took a shot at it. I don't think the idea works. AIO's took hold because of the influx of newer/older (not seasoned) people getting into the hobby. Aesthetics were a major consideration...