Salifert DKH reading

[axe_man16]

Tank is over 2 years. And i did a water change on Monday my calcium was 450 i tested the new water it was 350 so I added 3 capfulls of my calcium additive to get it to 450, did another test and it was fine. So I test the tank now and it is 550 for the calcium. A bit baffled

[phi delt reefer]

only thing i could say is your calcium test must have been off... even then three capfuls of calcium in a water change isnt going to bump your calcium that much unless its like a 5 gallon nano

[axe_man16]

It is very weird. My tank is 60 gallons with a 15g fuge, and a 30g sump. So a 5gallon water change shouldnt do that. Going to retest once more, but have gotten three tests all the same

[jostafew]

Not saying that this IS your problem, but I'm facing a similar issue and I'm pretty confident it was due to a bad batch of salt... Took me a long time to discover it and unfortunatly things got pretty bad. Mag and Calc were WAY high, Alk was low. I should have known better when the salt had an unusual texture and it took more than my usual 2.5 cups / 5gal to reach the desired SG.

The moral of my story is measure your freshly mixed water and make sure it isn't going into the tank already messed up.

[axe_man16]

The weird thing is that i did test the water before i did the change as I havnt checked it in a while. All was good then checked it next day and the parms were out of wack.

[marie]

You probably had some localized precipitation when you added the extra calcium (check your pump impellers and your heater that's where it will often settle out, too much precip. will seize the impellor)

You might want to check your Mg as well

oh and my alk frequently ends up at 5dkh, corals growth slows some but it doesn't kill them

[axe_man16]

Interesting... I am slowly getting my all back to normal, my mag when tested today was 1200. And I usually shoot for 1300 so it is a bit low. Going to do a WC tomorrow to help things get back to normal.