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Any idea what the brown stuff on this coral is?

Should I cut frag it down to get rid of the dead spots?

Just bought this over the weekend. Noticed a couple spots when I was dipping it. I don't know if it is spreading or retracting.

My mp40 just fell off the side of my tank. I cannot get them to reconnect. There is severe vibrations. The propeller has some give in it. Is there supposed to be able to move up and down the shaft?

Nothing out of the ordinary. I have two clowns - one is more dominant than the others, but has generally left the others alone. Also have a 7-8 inch blue hippo that my son has seen snipping at my acans and moving them across the sandbed.

All other fish are fine.

No changes.

I was away for the weekend and came home to see this on my Foxface. He is acting normal and has an appetite.

Had him for about 4 years now.

Feeding ocean nutrition formula 1 and 2. Been feeding that for years. Need more seaweed or mysis shrimp?

My tang has a "big belly". Not sure if that is the correct name or location, but I just noticed the bulge. Is this normal after eating or is something wrong with him?

I am at my brother in laws and has this thing that up that suddenly pooped up this week. Sent from my iPhone using Aquarium Advice

Clumps. Solution? I got behind in maintenance and finally changed my GFO and carbon reactor. Wasn't able to run my skimmer for last 4 weeks as well. (I got behind with the end of summer and getting kids back to school). All is up and running now - should that take care of it or should I try...

This stuff appeared on my sand in a 3 day period. Sent from my iPhone using Aquarium Advice

My Foxface keeps taking "bites" out of the top of my tank. Line he is eating some food that is not there. Why? Harmful? How to stop? Sent from my iPhone using Aquarium Advice

What is this spot on my blue? How do I stop it from growing and reduce it? Sent from my iPhone using Aquarium Advice

Thanks Sent from my iPhone using Aquarium Advice

How long can I keep water in my mixing can before I use it? I made some water about three weeks ago and am finally getting around to using it. It has been in a Brut trash can with lid, heater and two pumps to circulate the water. Safe to use or should I dump it and start over? Sent from...

I need help finding a storage tank to mix my saltwater. Currently using a Rubbermaid 42gal trash can. It has some buildup of crud from using Reef Crystals. Some Is coming off with scraping, but proving to be too difficult. Interestingly, the water in the mixing tank tested at 2.5 for...

My nitrates are very high - looks like 60-70. Will a good big batch of snails help clean up some of the excess waste around the tank and bring it down? I have zero algae issues. What is the best tester? I am using the Salifert kit. May be willing to spend the $ on a digital tester...

I have a 90 g mixed reef. Nitrates are too high and am in the process of getting it down. I did a 30 gallon WC yesterday by siphoning the heck out of the sand bed. (Used RODI water and Instant Icean Reef Crystals) Afterwards my way too many little sea stars which seem to be reproducing like...

I have a 90g mixed reef with literally many many hundreds of these starfish. Can anything get rid of them other than a Harlequin? Sent from my iPhone using Aquarium Advice

Really? I had a nice big one, but Sandy took care of it 2 years ago during the power outage. Could these be offshoots from that one? Sent from my iPhone using Aquarium Advice

What is this tube thing? About 1 inch high and 1/2 inch across. Sent from my iPhone using Aquarium Advice