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its actually my friend's tank that I am helping her with, so I am not sure of the exact levels. She was only feeding the fish every other day, which I thought might be a problem. she originally added dechlorinated water when she filled the tank, and now she has refilled those bottles let the...

I have a 20 ish gallon Saltwater tank. Fish only. And I originally bought some fish, had everything being monitored and then all of a sudden all the fish died within two days. my levels were all fine. Then just recently, I reset up the tank, let it cycle, then added one domino damsel. it's...

there are many other fish in the tank (2 other small ones) and I heard that a 30 gallon is ok for tangs. He has been living in there for almost a year now. : (

I have a yellow tang in a 30 gallon tank, with a purple chromis and a pajama cardinal. the tang seems to have some discoloration around its eyes, almost pale looking. Sometimes when I add fresh water to the tank, thus lowering the salinity level he seems to look better, but lately there has...

any idea what this bright green stuff could be on my sand? it's not really in patche,s just little spots here and there. also, how do you keep snails alive, or any suggestions for cleaners besides turbo snails

Hey- I thought my tank had already cycled, I had diatoms that eventually went away when i put some snails in. now the diatoms are starting to come back. what do I do? furthermore, i have occasionally small kelly green spots on my sand, what is this? last thing... all my snails have died except...

I have a blue damsel and it seems to be chasing and biting the fins of my other fish. all four of my fish have been in the tank since the start. what should I do? it is getting fed as much as the others. I don't want my other fish to die. (I have a yellow tang, a purple chromis/damsel, and a...

furthermore, does anyone have any suggestions of materials i can buy to read more about marine tanks, so I don't keep making mistakes. I am frustrated, because I am trying to learn by myself (im only 19) and I am putting a lot of money into it, but I want to learn more, before I waste any money...

I waited a week or sobefore adding fish. i thought that was ample time. now that my fish r in there, how can I help the problem? I also don't know when the cycle is over? Sorry this is my first tank : (

i have had the tank set up for about a month now. the water is tap water, but mized with a marine salt mix to kill problems with tap water. i have added fish relatively slowly. it's a 30 gallon tank. i just changed the filter carbon things the other day. any suggestions?

I was told the brown covering my sand was diatoms. It is now covering my sand and the back of my tank walla and beginning ont he front. is this normal? I feel like it is getting worse instead of better. I have been rotating the water, and my fish seem fine, but the brown is everywhere! what...

thanx for your help, I posted again under New Hobbyist, because of your recommendation. thank you! I went to a store and described it to the girl, she said maybe cyanocide or something, so I boguht stuff. should i wait to use it to see if it goes away?

I am new to the whole saltwater aquarium thing, but I did a lot of research before setting up my tank. I even set up a trial tank to see how my real tank would survive. I have had my tank set up for 2 months now, and there have been no problems until yesterday when i discovered some brown algae...

I think I may have the same problem. My tank has been up for about 8 weeks, and it's kind of brown and scattered on the bottom of my tank (on the sand) and some is on the ornaments in my tank, but there is none on the sides of the tanks or anything. Could it be the same, andif so can I do...

I am new to the whole saltwater aquarium thing, but I did a lot of research before setting up my tank. I even set up a trial tank to see how my real tank would survive. I have had my tank set up for 2 months now, and there have been no problems until yesterday when i discovered some brown algae...