What I would do - I think - is to stop adding anything directly to the tank. I would mix up change water and make sure that the levels in your change water are where you want them to be - so in other words add the "stuff" to your change water. Let the water sit for a couple of days to make sure it is going to maintain the appropriate levels - then do water changes. I would be worried that with all the additions to your tank you are actually damaging the balance and causing fluctuations. IMO it is not the corals and clams that are sucking the calcium out too fast. In my 110g cube I only dose with C-balance and do weekly 20% water changes. It is filled with SPS coral and 5 large clams (6-8"). I am using Tropic Marin salt on this tank.
If your salt is what is causing you the problem with this tank it might be cheaper to change salt now and lose $50 (or however much it is) than lose your corals and clams which are probably worth a fair bit more. Besides someone with a softies or FOWLR tank might want to buy your unused salt.
|