That'll last you for a while! When it gets close to 2ft. start planning the next bigger pond! You could just buy up the spare parts over time after you set up that tub, and it shouldn't hurt you in your wallet that much! that's kinda what I did. started out just the pond with a house filter hooked to a pump with the flow reversed, then I upgraded added canister filters, rocks, heating, landscaping bricks, fake plants inside, and finally tropical plants around it! You are gonna have an awesome catfish setup my friend! You could even try to put a viewing port in if you want your side view still! I am not gonna try with my pond, besides I will be upgrading again within the next few years!