Step 1 - get the tank going. Until you start going at things, there is little to no need to worry about testing calcium, alk
, or mag. You sure will if you want a SPS
dominated tank. That testing will tell you when your tank is growing SO fast, you'll have to start dosing. In reality, you'll know this because you will have a tank so full you'll have to set up another one for either frags or a larger tank for the massive colonies you are growing.
In terms of carbon and GFO
, I run varieties on my system. Some people need it, others don't. I use Purigen, phosguard, and chemipure elite. Not all at the same time, but those are my favorite products rather than straight carbon or gfo
due to clumping on gfo
and carbon dust. When running these products, you CAN just toss it in a main flow area in your sump, but it will be more effective when run in a reactor.
In all honesty, if this system was going to be very light on fish you can stay light on the media being run on the system. But, the stocking will determine the filtration you'll want.