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EXTERNAL FILTER BOX SET UP FOR KOI FISH ONLY at RM3500 including shipping . All customers can own DIY install . We will make all things standby . Before ship , we need all photos or videos extsting pond in house . This video we set up for customer in Bahau , add extra filter although house got ground filter too . Results absolutely good and water crystal clear too ! Koi also less sickness . 

1) Fiberglass filter box 4x2x2ft 

2) Filter matte 1x3ft

3) Oysters shells with bag x 2 sets 

4) Bio ray with nylon bag 5kg 

5) Mountain tree filter media 24pcs 

6) UV light 

7) Pond pump 12000L 

✅ A big filter box is generally considered very good for koi ponds because larger filters can handle more waste produced by the fish, leading to cleaner water and healthier koi; essentially, you can never have a filter that is too big for your koi pond, especially considering their size and appetite. 

Key points about using a big filter box for koi:
Waste management: Koi produce a significant amount of waste, so a larger filter can efficiently remove debris and ammonia, keeping water quality high. 

Better bacteria colonization: A larger filter provides more surface area for beneficial bacteria to grow, which is crucial for breaking down waste products. 

Reduced maintenance: With a larger filter, you won't need to clean it as frequently. 
Important considerations:

Filter design: Look for a filter with multiple chambers to allow for different types of filter media (mechanical, biological, and chemical). 
Water flow: Ensure the filter has enough water flow to properly clean the entire pond.