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My outside pond is running with a bakki tower 3 stacker and bio balls.
I used a few bags of aged media on the top tray to bleed thru the new unused media . The water is trying to clear but will probably be another 4 weeks befoere it snaps in. I'm using a bead filter that is backwashed every three days in front of it. I am also running a pencil thickness of new water in 24/7.
The inside pond is really nice. I added the BH material in a three stacker in addition to my trickle filter and j-mat ( 3 of em) vortexes. all drained each day with water in and out 24/7 pencil thickness.
So what I'm doing pretty much lines up with what doug and melissa are recommending.
the only thing I still cannot put my finger on is since I've added the bh filter the koi's activity and appetite is heighjtened. My j-mat is state of the art and literally boiling with air. the trickle tower degassed before the bh.
nothing ever showed on my water checks. the koi were always healthy.
I have been a proponent of the 24 /7 trickle in exchange and vorterx drainer on a daily basis for years, so I'm not about to change. The outside pond is lightly stocked and the inside way too crowded to suit my tastes.
For me, the bh has added something in the inside pond and I will retain it.
Time will tell on the outside one. Always before I would run multiple filters using different methods and media combined. never all my eggs in one basket. The only thing I tried and discarded was k-1. The water was good to start with and I could see that it added anything.
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