Koi Pond Filter Cleaning 锦鲤池过滤清洗 

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Every three months, I have to clean the filter of the pond. Also, I replaced a Matala filter roll in the 2nd filtration stage.
1.5" UNISEAL Flexible Tank Adapter (Bulkhead)：amzn.to/2XPw26B
4'' UNISEAL Flexible Tank Adapter (Bulkhead)： amzn.to/3ivOWaK
Matala Blue Filter Pad 39.5" x 24" x 1.5" Half Sheet Media: amzn.to/31ZivfR
Matala Pond Filter Media 22" Round x 6" thick- Blue: amzn.to/323zKMZ
Matala Pond Filter Media 22" Round x 6" thick- Grey: amzn.to/3gSRdff
Evolution Aqua K1 Micro Biological Filter Media: amzn.to/325tQe2
Superior Pump 91250 Utility Pump, 1/4 HP: amzn.to/3j2srv4
每三个月，我都得清洗过滤。并且更换了第二级过滤的滤材。