Filter Or Pressurized Filter?

[miafunk]

Im In The Process Of Currently Building An 8 X 8 X 4 Ft Pond. I Was Wondering If I Should Use A Reg Filter Or A Pressurized Filter. Plz Help Me With The Pros And Cons Of Each, And Plz Give Me Brand Names Of The Filter I Should Get.
Thanks
Jorge

[MCA]

There are many ways to carve the filtration turkey.

For my money unless site logistics force you to do so...I would not use a any pressurized filters. Let gravity do much of the work. Open filter contains give a great opportunity for gas exchange and replacement of DO used by the bacteria.

Water exiting a gravity feed filter system should have higher DO that when it entered. But with a pressurized tank...no way to add oxygen inside...so DO has to be less when exiting.

Some folks will say...you can make up for it elsewhere. I don't want a fitler I have to compensate for elsewhere. I am running two Nexus each with 410 Answers. Each have an Airtech 120L boiling the K1. Each of the two BDs have an Airtech 80L. Works for our fish......

[MCA]

BTW....2,000 gallons is very small for a koi pond. See you can at least do 8x16x6.

[Steve Nguyen]

Having done both of pressurized and gravity feed filtering, I recommend pressurized filter right after the settling tank for easy weekly maintenance work.

my old setup which require lots of maintenance work. pre-filter and biofilters are all gravity fed

pond water => settling tank => pre-filter with j-mats => pump => biofilter1 =>biofilter2 => water return to pond

new setup which reduced 80% of weekly maintenance work.

pond water => settling tank => pump => Ultima II => biofilter => return to pond

lots more time enjoying the fish

Steve