Outside ponds and filteration

[otolith]

Gravity fed filter via a bottom drain, pumped return from the clean side of the filter via a UV clarifier and then back into the pond through a venturi. Filtration, aeration, minimal noise, minimal maintenance. Easy to DIY with cold water expansion tanks, solvent weld fittings and a lot of silicone sealant for the bulkheads on the bottom drain and the filter. Particularly suited to raised or semi-raised designs, because you can incorporate a valve in the filter to allow you to flush all the fish crap out by gravity.

[satans worm]

Thanks for the replies, on the subject of the construction will 9inch blocks be ok?
Any tips or websites that explain the construction process? Just want to make sure I dont forget something in building it that I will regret in future!

Thanks

[Pupp]

No experience personally but one of my mates built a stunning carp pond and the filtration was based on a central heating pump, a placcie barrel, and some nylon gauze. Been in for years and the thing looks as healthy as hell