Simply Koi and More Koi

hi all ash11 here
ive just started building my koi pond this is new to me ive worked out i have 4000g the shop i have been getting my info from tells me they build there own filters and the one i require will be roughly 12 ft long any info would be great

Hello Ash 11 welcome to Koi Quest.

Is this 12ft one chamber multi bays or single chambers joined ??

Give the Members Ponds and Pond Construction and Pond Gizmo's sections of the forum a read/look through for what others are using as a filter setup, people use a wide range and mix of filter setups, from bottom drain into a vortex or nexus then into one sinlge filter containing multi bays, or from the vortex/nexus into fibreglass round or square single bay filters joined to make the required size of filter containing a mix of medias, and then their are trickle towers, bubble bead

It goes on like the duracell bummy