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The corals in my SPS tank were thriving up until a couple months ago. At that point, some started to fade, and polyp extension began to decrease. Then I started seeing STN onone coral after another--mostly acropora and to a lesser extent montiporas. Birdsnest, stylos, pocilloporas and...

Does anybody know if/how much overdriving T5's with an Icecap ballast affects the efficacy (lumens/watt)?

Does anybody know what kind of input the new controllable Koralias run on? I assumed that they ran on 12V DC and the flow was altered by changing the input voltage. However, I bought one and it won't run on any 6-12V DC input I've tried.

I'm running a hyposalinity QT and it's becoming very cloudy. Ammonia and nitrites are zero, nitrates are around 20. Alk is about 120 ppm, pH is about 8.1. I cycled the tank by ghost feeding, and I'm figuring that the cloudiness is the result of a bacterial bloom brought on by extra food left...

I have a 20H with a 29 sump that I just recently set up. I intend for it to house two onyx clowns with some softies and lps. If I were doing SPS, I'd definitely put a skimmer on there. But with what I want to keep, do I really need one so long as I do weekly 10% water changes?

I'm looking for lighting for a 10-gallon coral QT I want to set up. I was thinking I'd go with a 70W MH fixture, and the Viper seems like the cheapest, easiest option. Has anybody ever used one of these? If so, what are your general impressions/opinions of the unit? Thanks.

I've had a golden wrasse for a couple weeks now, and thought they were supposed to be carnivores. Yesterday, when I put in some algae for my tang, the golden wrasse started eating it too. It doesn't concern me, but I thought it was kind of odd. Has anybody else seen this behavior from them?

I'm not a noob, but I'm certainly feeling like one right now. My tank has recently undergone a rapid decline with simultaneous epidemics of flatworms, brown slime algae and ich. I've had some flatworms for a while, but never all that many. The brown slime algae and ich are both new. The...

My blue tang suddenly has ich and possibly a fungal infection too. I also have a radiant wrasse, yellow coris wrasse, two relatively small maroon clowns, firefish, mandarin dragonette and blue-spotted goby in the tank. Approximately what size tank will I need to quarantine all of them? Also...

I have a 75-gallon reef with a 40-gallon sump/fuge and an AquaC EV-240 skimmer. My current fish are a pair of gold-stripe maroon clowns, a hippo tang and a firefish. I would like to add a watchman goby, a radiant wrasse, and possibly a mandarin (I have a pretty substantial pod population). My...

I'm looking for a Mag 18. Anybody have one?

I have an aiptasia problem in my 75 gallon reef and I'm having difficulty getting it under control. I think it resulted at least in part from overfeeding and insufficient water changes, so I've decreased my feeding and gone to weekly water changes (I was previously changing 20-25% every two to...

I'm setting up a hypo tank, and I'm having trouble getting the pH up. It's at about 7.4 (maybe lower--that's the bottom end of the scale on my test kit) and I did the math to figure out how much kalk I need to get it up to 8.4, then added it. However, I'm not seeing any change. I can't...

I've read many times that MH can't be accurately compared to PC (or other) lighting simply in terms of wattage because they produce different amounts of light per watt consumed (which makes perfect sense to me). However, I've always gotten the impression that, per watt, PC gives off less light...

I'm selling my volitans lion because I'm upgrading to MH, and don't want to submit him to the stress. He's about 4" long, healthy, active and eats frozen foods without any difficulty. I'd like to get $35, as that's what I paid for him. Local pickup only.

I recently bought a used MH/T5 fixture for my 75 gallon reef. It worked fine for a few days, but now the MH's will start to warm up and then shut off after a few seconds. It happens with both bulbs, and nothing really changes when I switch the ballast/bulb combinations. If it were a problem...