heres what happened. its been about 40 degrees here during the day. and 25 at nite. the other day i bought 3 dozen minnows ,put em in a 5 gal bucket with a bubble box. and after 6 hours there was a dozen in the bottom on there sides getn washd around by the bubbles. so i turnd it off and2 hours later ther was only 2 layin on the bottom. so a coupl hours later i go back out and about a dozen wer layin around(lookin barely alive. so i turnd the box back on and they came back to life. for a few hours then back half dead. why was this happening. iv never had a problem like this before. anybody know why?