In a marine/reef tank, the biological filtration is done by bacteria growing in the live rock and sand. The skimmer is additional to remove proteins. Depending who you talk to, a skimmer is either vital/mandatory or not needed at all@reefing102 Wow! I appreciate it, that’s a lot to take in ! Looking through stuff now… I am used to fresh water tanks a protein skimmer is a replacement for a traditional filter correct?
There is no single “right” way to be successful in this hobby. It’s a lot of experimenting and figuring out what works for you. Example, I’ve been in the SW hobby for over 30 years. Never had a Cyanobacteria issue in any of my tanks. The current tank I’m just getting over battling Cyano for about a year.
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