I MEAN I COULD SEE IF THEY GOT EATTEN BY MY TSNS AFTER THEY WERE IN THE TANK...OR IF ALL MY FISH DIED IN THIS INCODENT...EVEN THOUGH I DON'T WANT ANY TO DIE IT WOULD MAKE MORE SENCE I HAVE A SILVER ARO, GAR, LARGE PLECO, SMALL YELLOW BULLHEAD AND LARGE JD THERE FINE RIGHT NOW I DID 2 OTHER CHANGES ALSO AND THOSE TANKS ARE FINE I HAVE SENSITIVE FISH IN THOSE ALSO....