hello i am new here. i wanted to ask if i have enough room for my irredescent sharks. i have a three foot by three foot pool pond. in it i have four irredescent sharks. three black and one albino. one of the black one is almost 1 foot while the other two are 8 to 7 inches long. the albino one is 6 inches. with them i have four silver dollars, each about 4 to 5 inches long. there is also a albino oscar about 4 inches and a raphaeil catfish, 6 inches long. the sharks are in it for for 8 months but only growed 1 or 2 inches. is there enough room for them since they are not growing that fast.