is a siamese fighting fish a bettaOne of the 2 cardinal rules of fishkeeping is to bypass overcrowding the other is to bypass overfeeding. Both of those can result in stress, sickness and fatalities. COMING UP: WHAT YOU NEED AND HOW AND WHERE TO SET UP YOUR FISHTANK. ‘I SAW WILD PARROTS IN NEW YORK CITY!’ is a new book by examiner George Sommers posted by Wiggles Press accessible April 2010!oldfish: Freshwater Fish Care and MaintenanceBefore buying your new freshwater goldfish, you’ll want to be sure that you’ve had an aquarium set up for at least seven days. This is because that water levels will spike after the aquarium has been set up for 3 or four days. If your fish already have weakened immune programs, this could be fatal for your new freshwater fish.