Hi Koi Lovers,
I need some advice as I am a newbie to the Koi world.

I have a 10 000 l pond, 30w UV light, 3 bag sand filter (using Cotton packs not sand), 25l Ultrazap biofilter.
I have a small fountain that runs of the system already.
The current pump is a 750w Speck Aquadrive 1100.
- Is my pump size ok for ideal water condition?
- How many litres per hour does this pump push out ?(it doesnt indicate this on the label)
- Is the 25l Ultrazap biofilter the correct size relative to the rest of the equipment?

lots of questions so please bear with me.
ps i have 20 tosai in the pond at the moment and the pond is 3 months old. yet my water is green. i had the water tested all on the test are fine