I can tell you straight away you don't need a chiller if you run a beneficial bacteria like root assist tea, long as you are keeping your temps within reason, say 77f and under, the Tea will keep it rot free. The chiller would be an un-needed expense. Also consider wrapping your buckets in reflectix from lowes. Its a easy way to insulate your buckets to help keep the temps a few degrees cooler.
I have seen my temps get up to 79f once without an issue, course this is not recommend you want to keep them in the lower 70's if possible but the tea will give you a nice buffer of protection.
I have seen my temps get up to 79f once without an issue, course this is not recommend you want to keep them in the lower 70's if possible but the tea will give you a nice buffer of protection.