Well... What I did wrong was applying only a single coat (even if generously) of waterproofing epoxy. When I double coated the stream beds and triple coated the lake beds, the leaking stopped. Now everything works perfectly--and impressively, if I must say so myself--definitely worth the effort.

Well...I got everything working: pump, tubing, stream, and pond; but my pond appears to be leaking(it wasn't when I first ran the system). I applied this generously over a week ago: http://www.amazon.com/gp/product/B001CEMU3I/ref=oh_o05_s00_i00_details . What did I do wrong?

If it is just humidity, I'm not too concerned; there will be less than 1/2 sq.ft. of permanent water surface in a 16,000 cu.ft. room. Were there other issues? (leaking is my greatest issue--so far so good).

Bought this--should work (29"head): http://ecx.images-amazon.com/images/I/410HTcPUEQL._SS500_.jpg

Boo Bachmann! No leaks, hookup worked; but the pump doesn't have the power to lift water up the 22" to the top of my stream. There was nothing in Bachmann 's literature to suggest that the pump was that whimpy--ripoff.

Thanks guys--good suggestions. I'm hoping to power a mountain stream that flows through my model ( God willing--and my waterproofing works).

What kind of tubing do you use for the mini water pump? Based on a user comment, I bought 1/4" ID vinyl tubing--which works on the intake. But the outflow only has a small rubber nub which will fit, but not hold the 1/4" tubing. It appears that 1/8" OD tubing will fit inside the rubber--but where can I buy something that small w/o having to buy 500' online?