Between my 3 tanks and 2 sumps I've got over 300gal of saltwater... I'd much rather have a 225gal with a 75gal sump. The only advantage to having many small tanks is so that you can keep things that arent compatible. I was able to save 4 acans, an open brain, a donut coral, a christmas tree worm rock, and a photosynthetic sea whip all from being eaten by my copperbanded butterfly by moving them to one of my other tanks. Also its easier to move smaller tanks down stairs and through narrow hallways...
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