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Message: [QUOTE="herzausstahl, post: 115709, member: 3540"] Thanks JW! So today I spent part of the afternoon working on the gorge and have it done. I am pretty sure it doesn't leak but going to test it tomorrow over a period of a few hours to see what happens. I will cover those issues in a moment. Here is the finished project in action with the 1500 gph pump: [ATTACH]42543.IPB[/ATTACH][ATTACH]42542.IPB[/ATTACH][ATTACH]42540.IPB[/ATTACH][ATTACH]42541.IPB[/ATTACH][ATTACH]42544.IPB[/ATTACH][ATTACH]42545.IPB[/ATTACH][ATTACH]42546.IPB[/ATTACH][ATTACH]42547.IPB[/ATTACH] So as for the issue of determining the leak, here are the issues. I know that the upper pool is not sealed by the dam, because it will leak out overnight when the pump is turned off, at least that is what I thought. This area is marked with the green arrow. I did notice lately thought that the outlet for the pump (marked with the red arrow) that it would shake a little bit after the pump is turned off and make a "clicking" noise. Then today when i thought the gorge was leaking I shut off the pump and left it and the upper pool drained down to the point of outlets, which are one-way sump pump line valves. Now could this be because as soon as I turned off the stream pump, I started the gorge pump and this sucked the valves down? The valves open downward toward the bottom of the pool and the gorge pump sits right below them, in fact it is right below the tail of the green arrow. Just thought of this as a potential cause now. But what I did earlier is I refilled the pool, the valves seamed to have closed and the pool stayed full to the top of the dam. I started the gorge pump and let it run for 30-45 minutes and the water level dropped about 1/2 inch during this time (I checked it over an hour later and it was down about an inch) so does the dam still leak a little bit as I first believed (it usually drains to a certain level and stops) or is this a combination of that and the evaporation due to the spray from the gorge. You can see the spray on the lower rocks in some of the pictures and it is marked with the blue X's. I did check along the edges of the rocks, marked by the yellow arrows, and saw no water leaking out and if it did the edges of the liner are sloped up so it would stay in that space and drain down into the pond. So I don't believe there is a leak there and I saw none going out the back as it did the last time before I raised the back rock. The outlet hose also sits flat on the bottom of the gorge stream facing forward and I did not see any water leaking behind there (the opening from the outlet hose is marked by the blue arrow). So I turned off the gorge pump and will see how low the water drains out over night and then tomorrow I will run the gorge for a few hours at this point and see how low the water level drops, it it does at all. Mostly I just don't want a big leak that will cause the area to settle a lot or force me to refill the pond daily. I do plan on connecting the gorge pump to the same timer as the stream so they will only run at the same time. So hopefully much ado about nothing and mainly need to have a set level in the upper pool when I test for leaks, bearing in mind how much splashes on the bottom two large rocks. Here is a pic of the new cave with the pumps sitting on top, I also moved the air pump on top of it in an attempt to cover up the pumps with the bubbles. [ATTACH]42548.IPB[/ATTACH] Here is where I placed the 1/2 whiskey barrel to hold my waterlily. It seems to still hold water without a liner, so I placed the lily in it along with a few of the horsetails i recently got, so I will have to see what happens. What does everyone prefer to fertilize their pond plants with? [ATTACH]42550.IPB[/ATTACH] I thought about trying it on the deck, but there wasn't enough room, so this way you can sit next to it on the bench, or pass it as you step onto the deck. [/QUOTE]

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