NEED HELP STAT!

For the last few weeks I've been looking after a pair of reef aquariums for a friend of mine. One of which is my old 55 gal setup that will be moved back to my home soon. The other is his 40 breeder set up. Well, when i stopped by there tonight things were awefully dark and quiet.

I quick investigation reveled that the 55 had no power at all, and only 1/2 the lights and 1 power head were running on the 40. I quickly located the electrical panel and tried to reset the expected tripped ...

Does anyone know how much I need to use to raise the Ca in a 50 Gal system by 50ppm? The directions on the bottle only say to use up to 5ml per 50 gal per day, but don't say what the result is.

I started paying much closer attention to my tank parameters since I added an SPS a few weeks back. It's doing well and showing noticable growth. But my kalk top off isn't keeping up with Calcium demand since I started dosing baking soda to keep my Alk up at 8.0 or higher. I'll ...