all paradise fish need to be in at least a 20 gal. long tank...they are very active swimmers and need at least that much room to swim
as others have stated they are very hardy, and not at all picky about food, as long as the temp of their water is between 73 and 78 they will be fine without a heater
7.5 gal is
WAY too small for a paradise fish they really need lots of swimming room
i have succesfully breed paradise fish in the past and even the newly hatchted (sp?) babies got a 10gal until they were about an inch long
please do more research on these fish before u buy them
http://www.liveaquaria.com/product/p...07&pcatid=1007
http://www.thatpetplace.com/pet/prod.../1/product.web
also, make sure u have a tight-fitting hood on your tank as they
will jump out