Hello everyone. I just purchased a 500 gallon tank and want to fill it with monster Amazonian critters. I spoke to my LFS about an Arapaima Gigas. My only worry is what to do with it when it outgrows the tank. The LFS suggested Monsterfiskeepers.com to sell it when it gets larger. I hope there are people here who purchase fish that large! I will check out the classifieds. I have kept fresh and salt water but my passion is for fresh.