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Old 12-13-2006, 02:20 PM
Richy44 Richy44 is offline
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I would adjust the mix to meet the levels of your main tank with suppliments. Starting with Mg.... then Ca and Alk. I find if you bring the Mg levels up first then the CA doesn't precipitate.

I am sure you know where your levels need to be but here are mine anyways:

MG: 1360/1400
Ca: 435
Alk: 3.45 Meq/L
Salinity: 1.024


Rich.......
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Old 12-13-2006, 02:38 PM
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Jaws Jaws is offline
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Thanks guys. I was moreso worried about the oily film on the top of the water. I haven't seen this before and though something might have got into the water and contaminated it. I added some alk and Ca buffer and did the water change anyways. I expected some corals to slime up and the skimmer to go nuts if there was a problem but everything seemed fine. Still nothing detectable the next morning but I'll keep an eye on it and post if I notice anything. Thanks for your help.
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Old 12-13-2006, 03:19 PM
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i seem to always have some film on top of the water when i mix up a batch,it seems a lot worse with some brands of salt,ive never worried about it much and i dont think its caused any trouble.
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Old 12-14-2006, 01:39 PM
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Maybe test your nitrite/nitrate/ammonia to see if anything is breaking down.
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