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Ok. Thanks to all.

Lights are on for about 9 hours a day. No sunlight. I change bulbs yearly. 4x24T5s.

I've uploaded some pictures of my live rock and how it is covered in algae. I have a 40g reef tank. Two weeks ago I completly cleabed the algae and now they're back. My nitrates and phos. are under 1ppm. Please help with id of what I'm dealing with here and of course advice on how to get rid...

Tried everything. Maybe I have high disolved organics... or maybe my lights are not ok... someone told me to put more curent (which I did) ... still I couldn't fix it (for 2 years I've tried). Decided to find some good artificial decorations:) Please, if you know any good ones...

I have another tank (40g) with live rock and it always gets full of algae. No matter what I do. And it is very difficult to clean (actually I've never managed to clean it completly). Then it gets full of algae again and again (even if my nitrates/phos are ok). The artificial decor can be...

Hello! I'm planing to start a new FO tank to host some not reef safe fish. I don't want to use live rock in the display tank as it is hard to care for (I will put some in the sump for filtration). I came across Instant Reef artificial decorations. Their website sounds good but I was wondering...

The tank is running for about 1 year and I have the coral for about 10 months. I have other corals but nothing near by (and for sure nothing that can touch it). It started looking like that about 1 week ago. In the beginning it looked like it was shedding a skin layer (or something like that)...

Hello! Pls. look at the pictures. Seems that half of the coral is dead :( Any idea why? The rest of the corals/fish are fine and the water parameters came out good. What can I do? Pls help! Imageshack - co008u.jpg Imageshack - co011.jpg Thanks!

Ok. Seems that I'm in big trouble :( Thanks!

Thanks for the advice! Seems that, in the mean time, the white spots have disappeared. I looked very carefully. What should I do?

I think I have a case of Cryptocaryon in my reef tank. My flame angel has two white spots on the caudal fin and my yellow tang has one on the dorsal fin and one on its body. I've also seen them scratch against objects in the tank. Apart from this, they seem ok (they are eating, swimming normally...

Ok. Thank you all for the advice!

I've been reading that artemia doesn't have too much nutritional value and that it is not a good food for my saltwater fish. What about "Ocean Nutrition Super Shrimp"? Is that ok? They say it is Enriched Brine Shrimp with Omega-3. However, they don't say how they've enriched it?! It is not gut...

Ok. Hope I no other fish will die. Thank you all for the answers!

Ok. The lack of correct food can be the answer, although the aquarium has enough algae in my opinion. But can this explain the sudden death? Bad nutrition should have made the fish to show some signs before the death (like being lethargic, getting thin, diseased etc.) shouldn't it?

It was eating like crazy, anything I was giving (formula 1, Formula 2, mysis, brine shrimp etc.). Even last evening I saw it eat some chopped krill and squid. This is what makes its death curious, it was very active, eating everything, looking perfect...

I have a thing called "Nitratreductor". Aqua Medic : Seawater Catalogue : Filter components : Nitratreductor NR 400 it seems to do its job.

NH3 - 0 NO2 - 0.02 ppm NO3- 0 PO4 - 0 KH - 8 PH - 8.2 Ca - 400-450 mg/l Mg - 1200 mg/l SG - 1023 The tank is small for a yellow tang. However, the fish is very small now so it fits ok. When it will grow I will move it to a larger tank. Thanks!

This morning I've found one of my fish dead, my Salarias fasciatus, and I cannot understand why. I have a 40g reef tank. The system is 8 months old, the water parameters are ok and the other tank mates seem to do fine. I have another 2 occellaris clowns, 2 dartfish (Nemateleotris decora), 1...

I'm having trouble raising the mag. I don't know why... I'm adding every other day but it will not increase the test result... maybe my mg supplement is not good. I'll try another brand.

alcalinity: 7 d KH calcium: 430 ppm mag: 1200 ppm ph: 8.2

I thought about that also. But what is the solution? I have a good skimmer (designed for 100g), I have a "Nitratreductor" and a phosphate sponge. I am not feeding too much anyway. The aquarium is not near a window or sunny place. I could cut back on lighting hours, but wouldn't this affect my...

Hello! I have an algae problem in my 40g reef tank (a lot of green hairy algae growing on my live rock). I keep removing the algae by hand but it grows back imediately. Also the glass gets completly green in max. 2-3 days after i clean it. I have no slime algae (ciano or diatoms). I have...

Ok. Thanks a lot!

What are they? Should I do something?