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My tank has been running fine for a number of years. I have not introduced any fish or coral for a long time. But for some reason, my yellow tang and purple tang have both got black pin head sized spots on their body. I think this could be Turbellarian Worms. I can't get photo to show you as...

My skimmer has been working fine until a fish died. After that, the skimmer would not produce any bubbles at all. I have changed water once and it occassionally skims a little and then stops. I have even cleaned my skimmer. So what is the problem? Could a dead fish casued so much problem in the...

My yellow tang has turned very thin and its fins and tails are very ragged. I also notice some red blood like patches on its body as shown in the photo below. Can anyone tell me what the problem is? All my other fish are fine.

I have bought a AquaC Remora MJ skimmer . It has been skimming for over two weeks. But the skimmate is very green and not smelly at all. I have tried everything and can't seem to get it skim better. My previous skimmer a Deltec MC600 was much better. Does anyone have any tips? I have already...

Some kind of red crust is spreading across my LR. It is very hard like a shell. Where they are growing, it will eventually cover the entire LR and kills off any coral that is on it. I have lost a few mushrooms and polyps already. Can anyone tell me what it is and how I can treat it?

The base of my toalstood has turned yellowish as you can see from the photo. It is also shrinking and the top is toppling over. Any idea what is happening to it? Otherwise it is fine at the top.

A couple days ago I cut my toastood to make it smaller. The 8 smaller pieces that were cut from it are held down with toothpicks. Before I cut it, I measured my NO2 and it was zero. Today it is about 0.3. Apart from a raised NO2 my skimmer also stopped skimming. Can someone tell me if the...

I have just changed to B-Ionic 2 part buffer. After applying it twice to my tank my pH has shot up to 8.5. It has been about 8.3 during the day. I always apply it in the morning when pH is at its lowest. What could be wrong? Doesn't B-Ionic buffer it to 8.3. What should I do to bring the pH down?

I have had my toadstool for about a year. It has grown from a couple inches in diameter to approximately 1'. It has been growing at an astonishing rate in the past few weeks and is taking over my tank. How big can they grow to? At this rate, it will be too big for my tank and I will probably...

I currently have 2 x 39W 42" T8 lights and is thinking of upgrading to some T5 HO. But the T5 tubes only comes in either 34" 39W or 46" 54W. My hood will not taking anything longer than 42", but the 36" seems a little bit short. Do you think a 36" will be strong enough to light up the ends of...

I had a Hanna ph meter for a few years and it has finally given up. But I am not prepared to pay a high price for one. I found this one on ebay. Is this any good. http://cgi.ebay.co.uk/NEW-Digital-pH-Meter-ATC-Pool-Aquarium-Wrrnty-buffer_W0QQitemZ7740844333QQcategoryZ3212QQrdZ1QQcmdZViewItem

I just bought a small piece of sun coral. I have placed it in a shady, calm area of my tank. I feed it with plankton by covering the coral with a plastic cover, so the plankton does not get blown away. During feeding the sun opens up nicely, but after feeding it would closes. And when the light...

I have just bought a six line wrasse and I think it is a great addition. I have done some research before purchasing and my understanding is that it is a peaceful fish. Although it might feed on unwanted pests on the LRs, I am not aware it is aggressive to inverts such as shrimps and other fish...

For some reason, every LFS in my area has ran out Kent Turbo Calcium so I bought a bottle of Liquid Reactor. Kent claims this is a one step ionic balanced addition. Since I haven't used it can anyone tell me what it is like? I am worried that it may drive my PH down because the instruction said...

I just got back from a 5 weeks vacation. I was so worried my tank would be in a mess that I bought myself an IP camera before I left. Had it set up facing my tank so that I could monitor it over the internet from abroad. I could see when it required maintenance and whether the skimmer needs...

It has been a while since I seen any copepods in my tank. I remember they used to show up like dots clinging onto the glass of my tank. But I haven't seen them for many months, so was wondering if they could have all died. And I also used to see a lot of tiny shrimp like frys that has glowing...

My Starburst polyp is spreading crazy everywhere, on my LR and over other polyps. It is taking over my tank. Is there anyway to stop them from spreading?

I just came back from a 5 weeks business trip in North Carolina and was dreading to see what my tank would be like when I came back. I left it in the good hands of my wife and surprisingly everything looked okay. The corals and fish are okay. Although she did not do any water changes, the...

I found a number of these under a rock. It is about 5mm long. I had to use a tweezer to remove them as they are attached quite hard. The photos show the top and underside of it. Are they good or bad?

Something has been growing over my xenia and is killing them. As you can see in the photo, it is a web like plant. It grows rapidly and it seems to be growing on other LR as well. Is it something I should worry about?

I have a CoCo worm that is healthy and shown no sign of stress. But last week a Bumble Bee snail crawled just inside of it's tube. Obviously the worm retracted but it has not come out again for several days. I looked down the tube and can't see any sign of it nor it's crown. So where is it? Has...

I found one of my Clarkii's eye has swollen up quite badly. It also appears to be cloudy. Does anyone what the problem is? What should I do? I think it would be difficult to QT him because of the LR and corals. The other fish seems to be okay.

The purple red encrusting of my starburst polyps seems to be thining out. This encrusting used to be pretty thick and wraps round a piece of LR. But in recent weeks, it is thinning out and there are a few holes appearing through it, so you can see the rock surface underneath it. Some of the...

My Christmas Tree worm is behaving strangely. It keep retracting back into its tube probably because of unwanted attention from my fish. But when it comes out again, the two crowns seems to alternate in color. One is white and the other is sort of pale grey. And the color rotates between the two...

I have a LR covered with colony polyps! A couple days ago, after I did a water change, the polyps stopped opening. They are all closed up and today I found a few have detached from the LR. I have no idea what is happening as all my other corals are fine. My water quality is fine with PO4=0...