...than other.? boxed in ponds made by building from railway sleepers.Want a sort of metal shute going from top to middle and middle to bottom, then pumped up again.Would like to find tanks with outlet for hose or a lip already incorporated. .Any ideas please. Bottom pond would be approx 2mx1.5 m-70cm .
deep.Top pond could be quite small and middle one 1mx1mx50cm. Thanks

I'm confused, are the ponds going to be tanks, RR sleepers with pond liners or tanks hidden by sleepers? RScott

I take it this is an elaborated version of your other question?

Well I would suggest useing old concrete guttering it you can get your hands on it cheaply... or failing that, I went ot my local garden certre and asked if that wanted rid of any broken teracotter pots... they pointed at an entire skip and said I could have what I wanted for nothing!

I used the broken pots to make a sort of mossiac water shoot that contored down a slope (Zigzag) to the bottom main pond...

It took some time because I have to mix cement to had to wait fr the first couple of levels to set and dry to test them before carry on... But the ned result was perfect!