Calcium levels driving me nuts

[bassman]

I have been trying to get my levels between 400-450ppm for a couple of months now and I am getting frustrated.

I am using a kalk drip all day to replace my evaporated water at the highest recommended mixture. (2tsp per 1 gallon) to maintain my levels. I am dosing at approx. 1 drip/sec

I use Kent Turbo Calcium daily to get the calcium up. I finally got it to 478 the other day, it's drop by 50-55 ppm daily since.

Once I got the level to 478 ppm I stopped adding the turbo in hopes that my Kalk drip would maintain the level. Not so I guess.

All my other levels are good. (the ones I test for anyways)

pH = 8.3 , Nitrate = 0, Nitrite = 0, Phos = 0, Alk = 9.8 dKH, Ammonia = 0

My tank is 95% softies.

Any help/suggestions would be appreciated.

Tank = 55gal, Sump = 55 gal, Fuge = 20gal