I am an Asian man so stereotypically I would cram as much fish as I can in a given space if possible. To be honest I think the fish like it more rather than having too much area for themselves. You won't observe certain social behaviors until they reach a certain population threshold. Having more fish reduces aggression even from fish in the same genotype. They could not focus on one specific fish to bully. They also do not hide as much. They feel more secure when there are a lot of fish around. Safety in numbers I guess. Most new fish I add immediately swim freely. No hiding period. I don't stack rocks and I leave a gap between rocks so they all have a place to sleep at night or dart when spooked. With all the area on top, the fish can swim freely and I have no issue with getting flow throughout the length of the tank.
Yes, I have compared the radions, Mithras and hydra52s. I would pick the ai hydra 52 hands down. I am ok with my finances and could have jumped in the led bandwagon when the ai sols came out. I just didn't think they were good enough for acros. I waited sooo long before I jumped in because I wanted an led fixture that I can control with my apex. When I found out the apex will come out with the awm and the hydra 52s, I knew it was time. Everyone was raving about the mitras because they were full spectrum but they were not controllable by the apex. Second, it is a European equipment which means it cost too much. $1300 was ridiculous too me. Even the first radion that sold for $950 seems overpriced. When ai came with the hydra 52 with 10 more LEDs than the radion with a price of $600 and using the same LEDs as the radion it was my time to jump in. The hydra has strong uv and the actinic is better compared to the radion pro. Brighter too just because it has 10 more LEDs than the radion. Also the hydra 52 runs at 135watts and the radion at 175 with fewer LEDs. I have the new radion xr15 pro in that anemone cube and the hydra is more pleasing to my eyes. I would prefer to put a hydra there but the apex awm can only control 12 ai fixtures. Since I already have the apex wxm controlling my vortech, I just upgraded the firmware and purchased a radion because I can control 11 total vortech a and radion with the wxm module. I am actually thinking about removing the remaining 3 x 400watt radius and replacing them with the radion pros simply because I can still control 5 additional radions.