I have 3 cichlids in my freshwater aquarium, and as they grow bigger, it is really hard to find aquarium decor that they can swim into/through. I was thinking that 3D printing would be perfect for this, but I was wondering two things. First off, could PLA be harmful to the fish? I would lean towards no, because many plastic parts are used in filters, etc. Second, will PLA degrade in an aquatic environment? If it matters, my aquarium is kept at about 78 F and at 7.6 pH.