I have one tank with a flowing stream and one with a waterfall and both work well, I know john doesn't like the water features but I think there awsome, if done right. Well What I did is use a tall plastic container(that I got crickets in), cut notches around the rim then raped the whole thing in screen then put the screen end down into the drainage layer. After I got it secure with substrate I lowered the pump in and haven't had any problems. I then used a coconut to cover us the pump well. Its kinda hard to see in these pics but I hope it helps![]()