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I recently bought a refractometer and noticed my salinity level was almost 1.030. So I lowered it to 1.025, and now all of my corals have been closed for the past week but my fish are doing great. Are my corals in shock or something?

I have a 29 gallon reef tank and 96w of T5 lights. I have (now this is a just a guess) about 200 baby snails ranging from the grain of salt to the size of sprinkle. I dont know where they came from but there are tons!! I also have a ton of scypha sponges, probably twice as many of them then...

Have a ton of copepods and amphipods. I have so many I can see them on everything, lights on or off. They are crawling all over my zoo polyps all day and night. The polyps have been closed for a while, but I know they sometimes close for a few days and then reopen. It has been over 3 weeks and...

Some people don't use any type of filter at all on a reef tank. Why is this, and is it recommended?

Can you, and how do you make a sump for a tank that is not made to have one? I have an older tank and it does not have an over flow or anything. I wanted to start a small sump and put some frags in there with a light and start growing frags? Is this possible?

Is it ok to run just actinic lights so the colors on my corals show better? Or is there another way to get my corals color to pop? Also will the corals grow if I only run actinic? I just have zoo's, mushrooms, GSP and leathers.

I went from 175w of PC to 96w of T5. My corals were going fine with the PC bulbs but not growing any. I upgraded 3 days ago and my corals opened great the first day, but now there barely opening. My water quality didn't change and my coral list is a few leathers and s GSP colony. Why is this...

I currently have a 29 gallon high tank with some corals. I'm looking to upgrade my lights to T5's. I have 175w of power compacts now and I would be buying 96w of T5's. My question is, is going from 175w of PC to only 96w of T5 an upgrade or downgrade? And how so?

I have had a PC light with 2 55 watt bulbs in my tank for about 3 months now and my leathers have always been shrunk down and a dark brown/tan color. I added a 65 watt PC fixture to my tank, so now I have 175 watts total. My leathers are finally opening up and i just added the new light today...

I have a 29 gallon reef tank with a few corals in it. But they all died. My water quality was just about perfect except for a little nitrate and phosphate but nothing too high. I have a power compact light with 2 65w 10k and actinic bulbs and I don't think there cutting it. I'm thinking of...