KH 170, Ca 260, Can't get it up.

[Myanth]

okay... so the 170 KH is listed as mg/L. So is the cacium. It is a nutrifin test kit and it says optimal level of Ca is 400-425, I know alot of people are 450-475, and the optimal KH is 105-120 mg/L.

I have added Seachem calcium, powdered, at a rate of 7.5g/40gal. It says that it will raise Ca 18mg/L with each 5g/40gal dose, so I should get a little more increase than that. The maximum daily dose is 10g/40gal. I have mixed up enough top off water to last ten to eleven days at a rate of 7.5g/40gal. I should, after that period be somewhere in the 400 range.

Is this too quick an increase? Should I dilute? And where should the KH really be?

I was going by this test kit and no other knowledge. Since my questioning of it I have seen numbers ranging from 100 - 350. Bev... Ruth? Shine some brilliance on me.

Thanks
Mike

[Ruth]

You should reveiw Bev's chemistry links that are a sticky in this forum to fully get the whole picture. I like to try to keep my levels at close to NSW (Natural Sea Water) so here is what I try to shoot for - a little more or less is not that big of a deal:
Alk - 2.9 meg/L or KH of 8 dKH
Calcium - 400 - 425 ppm
Magnesium - 1300-1500ppm

I have always used Salifert test kits to test the majority of my levels in my aquariums. They are easy to use and from what I have read fairly accurate. The only one that I am convinced is not very accurate is the Phosphate test kit.

As with everything in this hobby good things happen slowly and bad things happen quickly.

If I was you I would be tempted to either take a sample of your water into a LFS to have it tested or to a friend that has all 3 of the above test kits to double check for accuracy. See where you are at with all 3 and then go from there - slowly adjusting, testing and re-testing. Over the course of a week or two you should be able to adjust.

I can't remember what size of a system you are running but if it is not that big the easiest thing to do may be to just do a few large (50%) water changes.
HTH