Aug 9, 2000, 7:41 AM
Post #1 of 37
Dear Koi Lovers,
Vortex Units - Urgent!
I am planning to build a 22 tons (5000 Imp Gallons) pond. Pond shape is figure of 8, inground, measuring approx 20'x9'x4.5' with a pot fountain and shallow waterfall pond attached to a corner.
I am thinking of using the 4 x40" vortex units as described in Koi Kichi for my filtration system. Combined with a trickle tower, measuring 4' tall, diameter of 12" with 2' of Bioball.
My pond contractor is very concerned about the efficiency of this filtration system. He told me he has never seen something like that before. At leat in Johor Bahru. The system he advocated is a multichamber upflow filtration system.
I hope all you guys could enlighten me on the followings:
1. Is the 4 vortex units system, 1 prime vortex for mechanical and 3 for biological, adequate for our local conditions? Anyone with personal experience on this?
2. What is the stocking rate for this filtration system?
3. What is the reason for the 'non-popular' use of this system by our local koi keepers?
Honestly I am quite convinced that this system should work and is a long term design. I think Roddy Conrad had shared on this in other thread of this forum.
4. Type of pumps to use with this system in order to get a flow rate of 1800 to 2000 gallon per hour?
Considering using 3 Omni-U (Japan). One for waterfall/fountain and 2 others for the return water (timer-controlled, to work alternately for longer service life). BTW the Omni-U max capacity is 58 USG/min. Any comments on this?
Thank you and best regards.