Some of my Corals have been dying off. But some doing very well. I do water changes every two weeks. Use ro water. Had the water tested and the only issue was kh was low. Been dosing with two little fish a and b. kh is fine now as are other Params but the gh is off the charts. I test for gkh, kh, ph, nitrates and alk. All are within acceptable params at the moment. Tanks looks good but like I said I have too much die off. Lobo. Frogspawn. Blasto. All dead. But hammer some sps monti and softies doing really well. Any ideas? I use RO water, have a robust skimmer and proper lighting. The tank was fine for 2 years. This has only started happening in the last few months.
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Some Corals are dying off. Others are growing.
- Thread starter joeb558
- Start date
Joe, I thought it was a typo in the PM you sent me, but General Hardness (GH), is a freshwater test. General hardness is actually measured in saltwater tanks through magnesium, calcium and alkalinity tests.
Also kh and alk are the same thing, I agree that actual numbers would help. Also do you know your phosphate, calcium, and magnesium level?
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Has anything else changed? New lights, more flow, dosing? If they were 2 years in the tank and just started dieing it has to be something that changed recently. New fish or inverts snacking from time to time? Just putting ideas out there. Normally if it's water quality its the sticks that go first that's why I'm thinking it might be something else.
You might also wish to try a large water change....say 50%.
Another thought just came into my little beanie button......when is the last time you calibrated your refractometer? Could it be that your salt concentration is off? Just a thought, but not worth two cents.
Nothing has changed. I have not changed any equipment or lighting. It's been bau since day one. Yes the refractometer is calibrated and salinity level Is good. Keep in mind this has been happening slowly over the last few months. I have not added any livestock but did loose a few fish months ago. Pos and nitrates are low. Pos undetectable and nitrates around 5.
not trying to give you a hard time….just trying to help as are the other people on here who are very knowledgeable. But you have to give more specific information when it comes to your levels. Saying they are fine doesn't always mean they are fine. Low phosphates and nitrates to you could be really high compared to someone who runs a low nutrient system and they could be low compared to someone who likes to run a higher nutrient system. Since you are saying that your phosphates are 0 and in my experience LPS like water with some nutrients in it, I think you might be starving them. Again, not trying to give you a hard time but if you could post the exact numbers for all of your levels that will help everyone on here help you.
You should confirm those results. It's very possible to have zero phosphates in a system. Phosphates that are too low will result in coral tissue die off - http://www.wetwebmedia.com/ca/volume_5/volume_5_3/phosphates.htm. That's why they sell phosphate media that won't let levels get below .04. Most online vendors sell it, it's for folks with very clean tanks, less fish, etc. What is the best phosphate level to have with corals? I don't know, there are different opinions. But zero is too low.