okay i know this is an old thread, but instead of making a new thread for really the same idea i thought i would just bring this one back up. what type of pump do you use? a simple aquaponic pump? or is there a special pump that you need? next has any one tried adding fish to this mix? like edible fish like trout to there small pond/tank or is this a big no? this is my idea i would love to try. am getting ducks for eggs this year and next year i plan on giving them a pond. (am getting them in the fall so no water this year as it gets cold fast here) but next spring i want to give them a pond/tank to swim in, am thinking about 310 gallons or more (am getting six birds 3 ducks 3 geese) but with that size i don't want to dump the water out every day (and i leave in the summer so some times no one will check on them for about 2-3 days at rare times) but now here is the question is it easier to make an above ground pond with pond liner or should i go for a big stock tank, next how big for these amount of birds? and lastly i would love to raise some trout in there (if i can) so is that a good idea? next are the plants safe to eat with duck poop? or is it too dirty for human consumption? thanks its a small farm out.