Swapping filter timing?

[velokoi]

What is the recommended time to get a new bog filter working from a combo pressure tank mini bog?

I have 7 15" koi in a 2k gallon pond (8'x11'x3.5') being filtered by a few floating plants in the pond, lets say 30% of the filter. Then a small bead filter going to a small upflow waterfall/bog filter with a solid fill of plants, but only about 2 sf of space. I assume the pressure filter does 20% of the work and the waterfall bog does 50%. All and all not enough for our 7 koi to be happy and fed well, but the water stays clean if I purge the pressure filter each couple of weeks to a month or so, which I don't do hence the new bog a 22 sf full size for the pond upflow bog.

So how long do I leave both of them running before shutting down the old small system?

 

[velokoi]

Also how long until my fish surface again? They went to the bottom when I started 3 days ago and hardly even feed anymore. They seem very stressed by the change.

 

[mrsclem]

Sounds like your 2000 gallon pond is overstocked. Shutting down one of your filters is stressing them. Can you move some of them out?

 

[velokoi]

It is overstocked, which is why we are adding a 24SF bog, but both filters are still running and I have never shut down the old filter, water tests are good. They seemed more upset that I moved the old bog and the new bog looks different, water clarity has improved since I cleaned out the old filter when moving everything, so no water issue right now.

I am just curious thoughts on how I should run both filters? Then I will shut down the old system and move it to a quarantine area.

 

[GBBUDD]

Bogs take time to mature. The bacteria is only one small part of the bog we also need the microbes bugs worms and beattles to move in. Sometimes it takes a couple years

But yes I would leave both running you are over stocked and I would add as much filtration as I could . And I too have a bead I flush it every week . Takes no more than 5 minutes

 

[velokoi]

Fish are back to normal, pretty sure they were just upset I changed their view. All water tests have been fine, even found a baby that survived. I will likely leave the backup container bog for a week or two then remove. Pretty sure it is not needed anymore.

 

[velokoi]