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rennne39
03/19/2013, 10:14 PM
480ppm Calcium is
16.8dKH Alkalinity
6.0meq/l Alkalinity
300ppm (CaCO3) Alkalinity
can someone tell how to get the alkalinity down quickly

SloppyWhenWet
03/19/2013, 10:21 PM
You need higher mag.

bertoni
03/19/2013, 10:33 PM
Water changes are the only way to lower the alkalinity level. That level likely is safe enough as is, though, and I'd likely leave the tank alone if the animals are okay.

The usual cause of alkalinity levels like that is the use of pH buffers, which all add alkalinity, despite any claims to the contrary. Another source is tap water.

rennne39
03/19/2013, 10:35 PM
ok thanks a lot for the help if I do decide to add mag how long should i wait before I test it again

bertoni
03/19/2013, 10:43 PM
I would get a second opinion on the test kit before doing anything. That number is suspiciously low. You might try measuring the magnesium level of some freshly-mixed saltwater, as a start. Maybe a local fish store could run a test, as well.

The magnesium level can be measured as soon as the supplement has spread out. In my 29g systems, that took about 10 seconds. :)

rennne39
03/19/2013, 11:12 PM
also it says that the ph is 6.7 now

bertoni
03/19/2013, 11:16 PM
I don't believe that number. The rock would be dissolving. Is that from a pH meter? If so, the tank might have some issues with electrical interference, or the meter might need calibration, or the calibration solutions might be bad. As long as the animals are okay, I'd just ignore the pH for now.

rennne39
03/19/2013, 11:21 PM
ok thanks the animals seem to be ok and it is a ph meter that is telling me that

bertoni
03/19/2013, 11:24 PM
If you want to track down the problem, you can try measuring a cup of water well away from the tank, and be sure to plug the meter into a different circuit than the aquarium equipment, if the meter doesn't run on a battery. If that reading still says 6.7, I'd recalibrate, and likely buy a new set of solutions. The Oakton one-shot pouches are very good, in my experience. They're more expensive, but they can be a lot more reliable than a bottle that gets opened and then stored.

Or you could ignore the meter. :)

rennne39
03/20/2013, 12:19 AM
i moved it and now it says it is 7.0

disc1
03/20/2013, 08:18 AM
i moved it and now it says it is 7.0

That still cannot possibly be right. When was the last time this pH meter was calibrated?

rennne39
03/20/2013, 09:01 AM
a long time ago

rennne39
03/20/2013, 12:12 PM
went and got some calibrated fluid and it took care of the problem thanks all