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#1
11-07-2016, 01:33 AM
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LPS corals receding
so ive noticed that a couple of my scolies have started to recede (some more than others) and pretty much all my euphyllia are now dead. i have increased gyre output from 40% to about 50-60% to combat algea, which i assume is why my euphyllia are now done, but i dont get why the scolies are dying.
Here are my paramters. I have noticed that they have risen since i switched from AF reef salt to Salinity. Salinity: 37ppt Cal: 440 - salifert KH: 8.8 - salifert nitrate:0 - api phos: 0.04 - hanna water changes: every 4 weeks, about 60 gallons (25%) using Canadian Springs bottles based on web searches, all seem to be fine except my phos, but even when i had a phos reading of 0, i still had algea issues, so im not quite sure what im to do anymore. i've been dosing phosdown every 2 days to combat the algea issue. zeobak 12 drops every wed & sat, and upped my skimmer to fill up every 2-3 days. I don't dose any alk or ca and my parameters stay steady. Feeding has been cut back to once per day. Is there somthing i am missing or not doing that is causing this? 
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#2
11-07-2016, 01:47 AM
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Po4 at 0.04 ppm is great. Po4 at 0.00 ppm is not good. If you had more it rate in your tank you'd probably be able to keep PO4 down without the PhosDown.
What do you have for clean up crew? What type of lights and what is the light schedule? When you do a waterchange do you clean off the rocks with a baster and vacuum the sand or do you just take water ot and out water back in?
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#3
11-07-2016, 02:16 AM
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"If you had more it rate in your tank you'd probably be able to keep PO4 down without the PhosDown."
- more what? "What do you have for clean up crew? What type of lights and what is the light schedule?" - CUC: couple of trochus snails, there should be some nassarius in there, and 4-5 zebra hermits - lights: 3 x kessil 360, running from 2pm to 9pm - supplement with 2 x t5 (coral plus & blue plus) from 4pm-8pm "When you do a waterchange do you clean off the rocks with a baster and vacuum the sand or do you just take water ot and out water back in?" -vacuum gravel yes, basting rocks, not so much
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#5
11-07-2016, 04:29 AM
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Quote:
Myka's advice was meant as "Po4 at 0.04 ppm is great. NO3 at 0.00 ppm is not good." She typo'd. You're bacteria is NO3 limited right now. Get your NO3 up and PO4 will come down. Carbon dosing helps. Also, blow off your rocks before you do a water change every time. 
__________________
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#6
11-07-2016, 06:14 AM
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Quote:
It would be unusual for for cal and alk to "stay steady" without dosing and and doing water changes every 4 weeks... but if your levels are acurrate and stay steady i would think it may be some contaminant..
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#8
11-07-2016, 05:18 PM
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Quote:
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#9
11-07-2016, 08:28 PM
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Personally I'd stop dosing foz down or any other chemical that you're using that isn't just the basic alk, cal and mg. I find if I use any "reef safe" treatment for anything I'm gonna loose a coral or two.
Are your Scoly's under direct light? maybe shade them a bit. I'd suggest a big water change or two but I know thats hard with your volume of water especially if you aren't making RODI at home. Still when things go buggy I like a couple of big water changes to remove anything that may be in your water. Are all your other coral totally fine? What else do you have? Do you have a lot of coral and its just a couple that are going bad but everything else is fine?
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#10
11-07-2016, 05:47 AM
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Salinity is pretty high at 1.028 , I would buy a Salifert nitrate test to get a better idea where it's at for sure. If the nitrates are truly 0 then your LPS are not going to be happy , and as someone already mentioned will make your tank no3 limited and not allow bacteria to consume po4.
I also agree with investing in an rodi system. How often does the film algae regrow on the glass after cleaning ?
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