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Why would the powerheads have anything to do with it?

There have been no changes. I’ve had it for about two years in the same position. The dark spots are fluttering in the flow. It looks somewhat like cyano.

All, Could someone help me determine what is happening to my scroll? It appears like it is dying from the center out.

Pod. It's good for the tank.

100% emerald or ruby manthrax

All, I noticed that my hammer coral has a bubble forming in the center. From what I can see, there is a single pin hole. Has anyone experienced something of this sort? Thanks much

Other than the color, is there any difference between the two? Is one more aggressive than the other? Would one be more beneficial than the other? Any input would be appreciated.

Mine have been doing that lately. All of my parameters are good. I can't figure it out.

I have a large green star polyp and green hair algae started growing on it. The polyps no longer come out. What can I do about this?

100% tunicates

Great, thank you mr_X.

Would it be a good idea to introduce pods into my tank and then feed them and the coral with phytoplankton?

Now, would it be a good idea to introduce live pods to my tank and then put some phytoplankton in the tank once a week?

What puts ample nutrients in the water when fed?

Thank you, but I am referring to food other than light. Live, phyto, copes, blend, etc. I have a birds, acro, shrooms, leather, hammer, duncan, acan, great star, cups, pavonia, xenia, zoas, and trumpet.

What is your favorite coral food for growth and color? Thank you!

Happy New Years everyone. I have been doing research on the best food supplements for corals. Does anyone have any favorites, recommendations, and pros and cons? Thank you for your time in advance.

Has anyone ever had one of these in their tank? Are they harmful to a reef tank? Any input would be appreciated.

Thanks for everyone's replies. Would I take regular lemon juice that comes in the plastic lemon and squeeze it into the mouth with a syringe?

This guy showed up on my new live rock. It is 4x the size of most aptasia that I have seen. If this isn't aptasia, what is it? Thanks for everyone's help.

I have the same thing.

Does a night crawler live in saltwater? I'm just kidding. What is this really?

Definitely a barnacle.

Where did you find that out?

I guess it depends on what they are from. Hopefully someone else on here can help.