Hello. Glad to be a part of this reefing forum. Just got off the phone with Innovative Marine Systems. Back in the the day I had a 120 gallon reef. Looking to get back into it. Been looking at 25 gallon lagoon system AIO. Had a Biocube 29 back in the day, and for whatever reasons didn’t turn out well. The 120 did ok. To the reef aquarium experts… Better off with a 50 to 60 gallon with sump, or a smaller AIO? Thanks in advance. Chris