Any fishkeepers here? Saltwater or freshwater

[Holladay]

A) Freshwater is easier than salt. I strongly disagree. Freshwater is cheaper than salt, but you'll never get as strong a biological filtration system in a freshwater tank. As a consequence, you need to change the water out to get the waste out well

I would suggest there are options available to prove otherwise. See my post #25 on Overengineered RFUGF. I dont know of anyother way to get 18 FT SQUARED in just one filter method.