I would like a coral: comments suggestions
Hi,
I think the problem is that the kalk is a highly caustic solution (i.e. high pH). You need to have lots of CO2 to bring the excess pH down to normal seawater levels. This is why I would drip it at night and drip it slowly. CO2 levels are higher at night. CO2 is generated slowly by the fish and corals at night -- so kalk should be drip in accordingly.
Also, if the fish or anything touched the concentrated caustic solution as you are pouring it, you may have chemically burned the fish or coral.
In Andrew's case, his tank is much bigger so his pH increase will be small (plus he has a lot of fish).
Check your pH.
- Victor.
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