I have API and the API test is showing 9 kh, but I took my water sample to the local coral folks and the red sea pro test kit showed a horrible 6.5 Calc was testing at 500 API tested at 520, Phospate tested barely above 0 on API it tested at .03 with them. Nitrates (I dose) tested at .4 API showed barely above 0 so it fits. Everything but KH is reconcilable, but what kit should I get? Local coral shop wanted me to get a red sea pro kit, but I'm cheap haha! Also; what is the best stuff to dose for Alk?