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Old 09-12-2012, 06:01 PM   #31
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Ok I'm on the 6th day of cycling my tank and I'm starting to get the red algae on some of the base rock and the brown crap on my sand bed. Water changes should control both correct?
Is the "red algae" slimey like Cyanobacteria? Is the brown crap diatoms?

The diatoms will eventually go away on its own. Cyano- someone else can help with that. I've never dealt with it before.
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Old 09-12-2012, 07:41 PM   #32
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Pics of the algae. Keep in mind I have a skimmer and a uv sterilizer. Shouldn't the combination of both keep this from happening?
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Old 09-12-2012, 11:29 PM   #33
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If I am seeing this right- the purple stuff is coraline algae, it's good. You want it unless you hate the look of it. I believe it helps reduce nitrates and adds color to the rock!

I think the brown stuff is diatoms. If you give the water just above the brown stuff a little swish, does the brown stuff move around easily? Like, lift off the sand and float in the water column? Diatoms blooms happen because most sand has silicates in it. They eat the silicates. When the silicates are gone the diatoms disappear. While ugly to look at they will go away with time. Pwc's where you siphon just above the sand will remove some, but they won't stop until the silicates are gone.
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Old 09-12-2012, 11:36 PM   #34
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The brown stuff is definitely diatoms and like jenn said will go away on its own over time when the silicates are consumed.

The purple stuff does look like coralline. If it starts getting flowy and covering everything and growing uncontrollably really fast then it is cyano.
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Old 09-14-2012, 09:35 PM   #35
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What do you guys think of this light bulb set up for a 55g reef tank?
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Old 09-16-2012, 10:31 AM   #36
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Ok so water perimeters have been stable all week even after adding fish. Ammonia is at 0, ph is at 8.2, Nitrites are at 0 and Nitrates are at 1.0. Going to test the water again for phosphates, calcium and magnesium tomorrow and thinking about adding coral frags this week. Thoughts?
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Old 09-16-2012, 11:11 AM   #37
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Ok calcium is at 320, kh is at 14 or 250.6 ppm, phosphates are at 2.0 and nitrates are in between 0-5.0 now. How do I keep my nitrates stable?
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Old 09-16-2012, 11:18 AM   #38
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Water changes keep your nitrates down. Aim to keep them below 40. Anything under 10 or 15 is perfectly acceptable for reef tanks.

Your calcium should be between 400-450. Your dKH should be between 8-12.

What salt mix are you using and are you supplementing anything?
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Old 09-16-2012, 11:30 AM   #39
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Water changes keep your nitrates down. Aim to keep them below 40. Anything under 10 or 15 is perfectly acceptable for reef tanks.

Your calcium should be between 400-450. Your dKH should be between 8-12.

What salt mix are you using and are you supplementing anything?
Are my nitrates too low? I've done one water change and I've never seen the nitrates rise above 5. I've added Oceans Blend Calcium part 1 and Strontium & Molybdenum and I've been using Instant Ocean Reef Crytals.
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Old 09-16-2012, 11:37 AM   #40
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Nope your nitrates are fine. In a perfect world they would be undetectable but below 5 is absolutely fantastic! Instant ocean reef crystals is the salt I use.. and with weekly water changes I don't have to supplement anything. I'm just wondering how your dKH got up so high and your calcium got so low, lol. IME, reef crystals tests about 420 calcium out of the box and about 10 dKH.

I would do a PWC to try bring these number into check a little bit before adding coral frags.
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