Just wanted to say thank you for all the amazing info on here. I am trying my hand with a 55 gallon at fishkeeping, hopefully one day I can house a stingray or 2. Space is not a problem, I once housed 2 guinea pigs ina cage that was over 6 foot long and 2 1/2 feet wide. Lack of fish experience and $$ for a 300 gallon are my biggest obsticals now. I hope to have one in a few years or so. Anyway, wanted to say hi and thanks- if not for this site I probably would have a stingray in my 55 gal now- as thats what I was told years ago they can live in for life!