Hello all I have 4 of the sun cats in my 220 tank and they grow very slow i got them 2 1/2 years ago and they are like only 5-7 inches, the channel cat will out grow it very fast and may eat them.

How about a computer battery backup from APC or Belkin that is what i use and the small ones are cheap like 35 bucks they keep a 802 air pump going for a long time