Ok ill throw my $0.02 in it for what it’s worth.
i recently moved cross country before the move i had a 90, 150 and 125 gal reef tanks plus qt tanks set up. Sold most everything before we moved, livestock and tanks. Only took some chunky frags of a few softies and lps along with a few fish. that all got tossed into my old qt setup for a few months. Well after we settled i started getting depressed with my tank so i told my wife i was gonna start looking for a tank between 20-30 gals to setup for my coral and fish. I too was looking at the biocube, redsea reefer 170, jbj nano cube along with a few others.
Well my wife found a jbj24 aio on letgo for $50 with stand that she surprised me with. Now all in all there a good tank but just like the biocube the lights are junk and the bulky top frame really takes away from the look of the tank. I honestly didn’t think it would bother me so much but it does, that and the curved front corners sometimes causes a weird light effect with my hydra 26.
i was really excited about the aio part but quickly realized how little room i had for anything. I have to stack stuff in the chambers just right or it doesn’t fit. Between the media basket, return pumps, heaters, ato unit, apex probs and I'm sure I'm forgetting a few things theres no room left at all. Oh and i miss a skimmer. Theres no way ill have a hob or nano skimmer in the little compartment. Talk about a eye sore and then the first time it over filled yeah that would smell lovely in the dinning room.
Im not searching hard but am keeping a eye out for a used RedSea Reefer 170 or maybe the next size up. If i find one at the right price I’ll be replacing the jbj, which by the way looks very similar to the biocube.
well hope this doesnt make it worse. Good luck on your decision.
Matt