bottom drain

So I am trying to figure out if I want to have a diffuser on the bottom drain for the pond i am planning. It is not a very large pond. I would say maybe 6 foot wide and 12 foot long. Due to its shape I'm not sure if the diffuser would really be efficient at its job and really worth the extra...

OK guys I need some help. I need some advise on how to design a filter for the pond. I am thinking about basically making a traditional sump like for a aquarium but buried underground. I am gonna use a bottom drain system with the pump after the filtration. I have some ideas but would love to...