I would also be remiss if I left out plants like dieffenbachi, and Arum, that contain oxilates that are toxic to cats and dogs, but fish instinctualy avoid.
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I even have a mni-pineapple propped up on the back of the tank.
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Hey Duanes, how long has that mini pineapple been growing with its roots fully immersed in water? I have one in a pot and wouldn’t mind throwing it in the sump.