Originally Posted by jellyman

The river flows into a catch basin. In the last pic you can see some river rocks and the water flows into them and goes down into the catch basin and out the bottom of the tank back into a sump. There is no standing water just the slow flow down the river.

I have used Dynaflex on alot of builds and I really like it. It setsup and cures very fast and seems to stand up to the test of time extremely well. I have not used the GE Silicone so I cannot give a comparison.