DrDave said:
You are right! The problem I see with many filtration systems is the more complex ones seem to be in the ponds with the most problems. I have kept my pond simple and it works for me. I get hundreds of vistors each year. The common denominator to all the problems I hear, is complex and expensive commercial filtration systems.
With the Doc Bio filter, all the trapped gunk is held in the vortex created in the bottom of the 55 gallon drum. The dump valve removes it in seconds. Your system traps it and then returns it to the pond through your upper pond. Good circulation in the ponds and a simple bio filter with a dump valve should take care of the conditions you have described.
When that water lettuce is ready, get it into the pond and shoot for 60% coverage.
An occasional batting fines filtration as sissy mentioned helps get particles out of solution as well.
I posted the following on koiphen.com. Maybe you could comment!
What should I believe?
OK, I removed my "100 rubbermaid stock tank filter". The tank sat emerged in a 300 gal "upper pond chamber". After the tank was out and the water drained, I shoveled some of the nastiest brown goo I have ever seen from the bottom of this pond cavity!
I removed the muck laden 2" fiberpad. The 3 cu ft of shaved PVC section was "totally" packed with green stuff, as well as the 200 lbs of lava rock. Yea, I know lava rock sukz!
I power washed everything and re-installed everything.
I was convinced last night that this whole cleaning process is insane the way I am doing it. I had to get my backhoe and lift the tank out, powerwash everything, deal with muck and mud.....etc.
Then somewhere on the web, this morning, I read that I should have never cleaned out the green stuuf because it is beneficial slime eating bacteria.
What should I believe?
I am starting to feel the need for some sort of "backflush" mechanism!
Should I:
Purchase a $800 bio-filter - i really do not want to spend that amount of money!
Build another better bio-filter - may if i had a trusted design!
Re-engineer my current filter setup - no clue right now.
Whatever I choose, I am stuck with what I have for this year.
mark