Water Too Soft: What am I missing?
Preface: I used the search button and found a number of ways to increase hardness, but nothing that I'm very comfortable with. Coming from a fish breeding background, I've always been told that trying to alter PH/KH of tap water with chemicals is an exercise in futility for the long term.
I have a high tech tank (4wpg, auto CO2 injection) and am struggling with keeping the water hard enough. The CO2 hardly ever comes on because the PH dives so quickly.
For now, I stuck some crushed coral in my canister filter, but it seems to be having only a minimal effect. Is there a recommended dosage? I only put a handful in. How can I keep a 4-5 degree level of hardness with any level of consistency? I guess I'm looking for something a little more specific than "toss some baking soda or calcium carbonate." Anyone?
My Tap Water:
Hardness: 0.5 - 1.0 degrees
40 Gallon Breeder
4 x 39 watt HO T5 6500k
Eheim 2128 Canister Filter
Pressurized CO2 with Neptune PH Controller