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Old 05-05-2007, 12:29 AM   #11
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Over 8.6? I'm glad this question was posed because I was going to ask it. My reading has been 8.4 over the past two weeks. I was cycling at the time. I take the reading at same time every evening about 7 pm. I did a 20% water change today (first one after cycling) and it remained at 8.4. Based on this thread I will not worry.

BTW, the alk seems a little high as it is at 3.20.

kh/alk = 9.0/3.20
Nitrite and ammonia are 0..
Nitrate is at 5.
PO4 is at .25.
Salinity is 1.025, I use Reef Crystals salt and tank has been up and running a little over a month.

Is 3.20 Alk to high?
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Old 05-05-2007, 12:38 AM   #12
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Alk of 3-4 meg/l is ideal as it allows some room for test kit/user error and fluctuations without being too low or high. FWIW NSW is about 2.3-2.5. Reef Crystal usually test around 4 meg.l at 1.025. Maybe some alk was used neutralizing acids.?
Your PO4 is very high right now, but I don't think thats surprising since you just finished cycling. You may want to run a PO4 reducer like rowaphos or phosban. That will prevent algae blooms and stop your LR/LS from soaking it up and possibly releasing it later. PO4 should be <.03 ideally in a reef.
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Old 05-05-2007, 12:38 AM   #13
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Chase33... except for your phosphates, your numbers look great! 3.2 meq/l for alkalinity is definitely not too high. Some might say it's a little on the low side if you're keeping corals. And while cycling, your pH will wander around anyway. No need to worry about it until you get something alive in there. Even so, anything 8.0-8.4 is just fine.

Once you're done with the cycle, I'd get some RowaPhos sponges and run them somewhere they get good flow through them. Over a month or so, they should eliminate those phosphates. You'll want to get those down to undetectable before you start adding anything. No reason to start a new tank off with the potential for an algae issue when you have enough other things to worry about!
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Old 05-05-2007, 12:50 AM   #14
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^^Darn thats twice today I got caught spell checking after I hit submit


Thread split, Chase33 see "Rowaphos sponge" in this forum.
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