Flatlandreefer
Active Member
- Joined
- Feb 28, 2017
- Messages
- 293
- Reaction score
- 238
- What state or country do you live in
- Kansas
I am thinking about setting up a 50 gallon frag system. My question is, besides running a skimmer for mechanical filtration what is typically used as a for biological filtration in the sump as there will be no live rock in the main tank?
