[Funky_Fish14]

I say its alot easier to have 20 freshwater tanks than 20 saltwater tanks just because of the cost factor. Im not saying you cant get into high $$$ with Freshwater, but its alot easier to spend all the money with SW and there is money you need to spend. Consider setting up 20 x 20g Nano Reefs, and 20 x 20g FW Planted Tanks, IMO its alot easier, and potentially cheaper to do the FW planted tanks than SW reefs. Yes, there are different factors that can be weighed in but on average, IMO, its cheaper for FW. Most plants grow much quicker than corals, you can take one plant IE: Java Fern, simple plant, and it will fill a tank quite quickly whereas with most corals, even thin-barred or pulsing xenia, which grow quite quickly for corals, would likely take longer to fill the tank.

Chris