Pond Filters and Biofiltration

New Filter Syndrome Small New Fish Koi Pond Problems  My problem is the water quality is not good, I have done numerous things to rectify it, and as I'm new to koi keeping I'm very keen to get it right.

Ponds and beneficial filter bacteria various types of bacteria do different jobs

Biological filtration uses bacteria to remove pond waste or muck bacteria inside a biofilter oxidise waste to nitrites, nitrates and carbon dioxide

Restarting your koi or goldfish pond after winter lots to think about and do after winter for carefree summer to happen

Nitrite ammonia pond water problems new pondfilter NFS syndrome.