You are assuming that the trace and minor elements are being consumed at a rate higher than 10% (very simplified number for what is a complicated system). That's why I would like to see some data on the consumption rates of all these various elements that apparently need to be dosed to replenish them beyond what a water change might accomplish. Randy Holmes-Farley seems to indicate that many are used up very slowly and that our salt mixes contain more than natural sea water in any case. I just don't have time to check all his references right now. I imagine Dr. Balling would have some data on the consumption rates of these various elements in a "typical" reef system and some data on how regular water changes don't replenish them sufficiently thus supporting the use of his supplements. Perhaps you could ask for that or some references?
The chemistry beyond the use of the major elements such as Ca and carbonate is complex and I suspect varies greatly from system to system depending on types of corals and inverts etc. I'm not convinced that this one size fits all solution is best for everyone, let alone even necessary given the low rate of use of uptake of the trace elements and the ability to replenish via water changes.
|