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jtang
Koi Lover

Oct 10, 2000, 12:42 PM

Post #1 of 4 (625 views)
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I was talking to a koi seller over the weekend regard filter. I was telling them that I am replacing my 25 gallon filter with 55 gallon barrel. My pond size is about 1,000 gallon. They told me that a 55 gallon is not going to be sufficient that recommend using 300 gallon as a filter system. I was surprise to hear that. WHat is everone idea or take on this? Are they trying to sell me there own filter rather than letting me build my own???


thanks


dttk
Senior Member

Oct 11, 2000, 12:07 AM

Post #2 of 4 (625 views)
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Dear Joe, ideally we should try to achieve a filter surface area of at least 30% of pond surface area. So a 300gal filter for a 1000gal pond is quite alright. However, this is not always possible due to financial constraints or space limitations. If these are not a problem, then by all means get a larger filter if you are really serious about this hobby. A larger filter will do the water and your koi a world of good.


Mark
Koi Kichi

Oct 11, 2000, 11:33 AM

Post #3 of 4 (625 views)
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Hi
A wet 300gal filter vs. 1000gal pond will not necessary give us 30% surface area.
When building a filter, do remember that a 3feet depths will not be as effective as a 20 inches depth filter due to DO. Good bact. is difficult to survive in deep water unless some form of aeration is added.
Contrary for a wet/dry filter, high depths is very important like 4 to 10 feet tower.

Hope this help.


jtang
Koi Lover

Oct 11, 2000, 12:18 PM

Post #4 of 4 (625 views)
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Let me see if I understand it correctly, I know if media is submerge all the time than it is not good for bacteria to conolize because of lack of oxygen. If water is pass through the media, like a wet/dry trickle than it is better because more oxygen for bacteria. To sume it up it sounds like the best is to keep media submerge right?
Second question, I am using a 55 gallon barrel. At the bottom of the barrel I am cutting pieces of Japanese green matting and laying vertically. On top of the matting I have 3cu ft of bio-ball wrap around with bird netting. I also have a pre-filter that come with the submerg pump that is connect to the punp inlet. The pump takes the water from pond to top of barrel and goes through the bird netting and bio-ball than down to the matting and back out to the pond. I know that the bio-ball and bird netting will we great beacasue more likely it is not submerg therefore giving bacteria great place to colonize. The matting on the other hand might not be all the time submerg, especially on the top of the matting. Just to play it safe, how do I get more oxygen to the matting without bringing in a areator with airstone? Will this design work for my 1000 gallon pond???

thanks

 
 
 



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