In-Pond Gravel Filter - Please Help

I have an in-pond gravel filter that served me well for many years but I decided to clean the bottom from leaves after a storm.
I have an in-pond gravel filter that served me well for many years but I decided to clean the bottom from leaves after a storm.
The 2021 Japan October Harvest
A neat and highly effective partnership for aquaculture and koi water recirculating systems (RAS).
The 2021 Tosai season is closing. Pictures of some boxes imported and delivered to assess the offering and quality.