I have a 40 gal sump, thats been running for about 2 years, don't know name of return pump but it pushes 900 gal per hour, I keep my temp at 78. Have a jabaeo wave maker that will push the water out the tank wide open, lolI know you’re not asking me lol but I think it’s good. You have enough open space and it seems like you have cover/hiding spots for him. Not sure what you have for filtration but that is one of the most important things. Also what temp do you have the tank at? My manueli does like to have cover but enjoys surfing the tank.