when setting up a pond (1000)gallons for koi do I need to add, water conditioners and cycle (bacteria) like you do for an aquarium? this isnt mine, i'm helping a friend set up his pond with a submersible filter and uv filtration cuz the lady that built it for him only set him up with a water circulation pump which feeds hil waterfall. I think originally he didnt plan on putting fish in it but wants to now. I will be doing it this weekend so please give me some info.