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I noticed these guys on my live rock. I noticed that they were starfish but I could not tell if they at the ones that are coral. I'm hoping they are just algae eaters.

So I don't know if I should add more salt water to my tank or freshwater. My refractometer says my salt is low but when I added salt all my corals shrunk up. When I added fresh back in they started to come back. So I don't know if I should judge on my meter or my corals reaction. My meter says...

So my protein skimmer has a black sponge that is almost fully deteriorated from cleaning it harshly (to remove trapped algae). When I look for a replacement part I can find one. The skimmer is a reef octopus HoB 100 classic. The part I'm looking to replace is called the black sponge in the...

So I'm doing my big tank cleaning of the month and everything is normal but this time the tank smells bad. So I open a window to let the room air out as I try to figure this out. And i see this. What do I do. I know I need to bleach the spot and replace the drywall but I don't want to harm the...

So I just got a new set of clowns yesterday and they still won't eat. It's like they don't notice it. All they do is attack there reflection. Is this a normal thing they do in tanks or should I be worried? All tank parameters are perfect. Sent from my iPhone using Aquarium Advice

So I thought it be neat if all shared our own mistakes that we learned from. Mine just happened recently. For ever I have been battling brown algae, no matter how little I fed or light I gave it kept coming back. Then I found out the tap water I de-clorinized for top offs was the cause of my...

So I lost my 2 new clownfish (they did not make it 3 days, one jumped, the other died from a self inflicted injury) and now I'm looking for some ideas for fish. Currently all I have are a bunch of corals and 1 zebra hermit crab. I would like to get peaceful fish that wold all easily get along...

So I got a pair of clowns and they dies within a week. The first one died 2 days after I got him, probably from a sickness, and the other jumped out of the tank (into a small cup 4 feet from the top of the tank). I suspect the cleaner shrimp spooked the fish into jumping and cleaned the other...

So I got a new light system for the holidays and it allows me to change the intensity of the blue lights vs the white. So what percent do you guys run your white lights and blue lights for the best results. Sent from my iPhone using Aquarium Advice

So just got back from a trip to key west and had to do a massive tank cleaning. Every time me and my family go on vacation algae takes over my tank. I had a person come over and feed the fish plus add water so the filter would work. What I was wondering was how you guys keep your tanks clean...

So my yellow coris wrasse has been hiding for almost 5 days now. I removed the six line that was picking on him. He has come out yesterday to look around because I had to move all the rock around to get the 6 line out. He has not eaten since I last feed him 6 days ago, and I'm worried he is to...

So I have to remove my six line. I love him but he is terrorizing my coris wrasse to never come out of the sand. Anyone have a trick to try and get one of these fish out. I need a easy method, because I'm at school and my mom is going to attempt to remove him. Sent from my iPhone using...

So I was looking at my tank and noticed that my coris wrasse had a cut on his head and a cut under his fin. What I was wondering is something like this fatal or will it heal up. It looks like he just nicked himself on the rocks. I will post tank specs if you think it's necessary. Sent from my...

My yellow Coris wrasse is the strangest fish I have seen personality wise. Just today he had some scuffed up scales so I he did a couple quick passes by a rock and knocked them off. He acting perfectly fine as well. Sometimes I find him swimming in loops, like upside down and everything. Anyone...

So I was looking at my tank and I saw this Is this something that could be harmful. Let me know because I have not seen it until today. Sent from my iPhone using Aquarium Advice

So came home today, and noticed some algae around the frogspawn so I got my tooth brush out and started scraping. When I acidentaly knocked it over and saw that the main stem was shrinking. I don't know it it's because the stem is mainly under rocks or something else. The color is normal, and it...

So I need a new sponge for my my reef octopus bh-100. The main black sponge has sort of disengrated. Before we figured out that the pipes come out to clean the sponge, I use to stab and rinse it with hot water to try and clean it. Do you guys know where I can find a replacement sponge, I have...

So since I'm sort of cleaning my tank up and adding more to it I was wondering about live sand. I have a open bag that has been open for a few months now but I have always kept it wet by pouring some salt water into the bag. Is it fine if I use sand from the bag or should I go get a fresh bag.

Hi guys I'm new here. I have a 29 gallon salt water reef tank. It considered contains 2 corals and 2 clownfish. As of now I am working on adding to the tank, adding more live rock and coral, as well as a fish or 2 so you can expect some questions from me. I already have some questions and...

So it's a tank I have been released naming for about 3 years now, and 2 of those years has been with live coral. The tank is a rectangular 29 gallon tank. The systems are 2 heaters (long ago a old one broke and since no back up things were cold), a pump and a octopus proteins skimmer, as well as...

So tonight when I was feeding my 2 clown fish I noticed my male seemed a bit pale, not like clear or anything but like how he might look if you turn the light off at night and turn it back on, so it's like faded color. This morning he was perfectly normal, the only thing is that I turned the...

So recently my new acan coral has not been expanding to its full size, and recently it's loosing color in the center of one of the heads(turning brown). I started feeding it brine shrimp because I read some where that's what you do if you want corals to grow better. Also my star polyp coral has...