Slightly confused about test results

[eskimoigloo]

Hello, now my tank has settled down, I've started doing my tests again, got the following:

pH 7.8
Ca 450
Mg 1360
dkH 5.8

So I have low alkalinity. I used to have low Ca too and used to dose Kalkwasser, but as my Ca is fine how can I raise just the dkH? Nothing looks badly in the tank, but I want to start keeping some LPS again (after they died in the old tank) and lots more Zoo's. Do I just need to add a tsp of Bicarb to my next water change?

Any advice appreciated as always!

[lasgringo]

use this calculator mate,

http://jdieck1.home.comcast.net/~jdieck1/chemcalc.html

just put in volume of tank either litres or us gallons,put in required levels and pick a product from the list:)

[michael.]

Hello, now my tank has settled down, I've started doing my tests again, got the following:

pH 7.8
Ca 450
Mg 1360
dkH 5.8

So I have low alkalinity. I used to have low Ca too and used to dose Kalkwasser, but as my Ca is fine how can I raise just the dkH? Nothing looks badly in the tank, but I want to start keeping some LPS again (after they died in the old tank) and lots more Zoo's. Do I just need to add a tsp of Bicarb to my next water change?

Any advice appreciated as always!

http://web.archive.org/web/20021127040526/http://www.advancedaquarist.com/issues/nov2002/chem.htm

[michael.]

http://www.reefkeeping.com/issues/2004-09/rhf/index.php

the ph is low as well, try letting fresh air into the room and get the water surface moving more, also regular water changes can also help raise the ph