Samw,
What do you currently use to maintain the alkalinity in the water? With the constant additions of calcium, alkalinity will naturally be forced down unless it is maintained in equal additions. That along with the proper maintenance of magnesium will keep them all in solution together.
True, ionic compounds can help but I do find that they may cause imbalances in larger systems depending on bio-load.
The other thing you need to be concerned about is the constant addition of the strontium and magnesium. Although the Reef Complete is balanced going in, the calcerous animals in the tank will not use them up in the same balanced fashion. The rates of consumption will vary from week to week and will need to be tweeked on occation to keep them in line. If strontium becomes too high (above 267ppm) most test kits are not sensitive enough to tell the difference between the two ions and instead add them together.
Cheers
Steve
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