does anyone know the max temp a nautilus can be kept at? even though it isn;t what is recommended ii kept a couple at about 75 for about 6 months, (i know they come up to shallower warmer water to feed so i hoped they could handle slightly warmer water than the recommended cooler temp), and they actually did really really well until i lost them due to equipment failure. so i don;t know how they would have done in the longer run otherwise and i didn;t have them in the warmer months...the worry is that my tanks can get up to 80 degrees in the summer, can they handle that for brief periods of time or do i need to save up for a chiller?