I'm planning on building a water garden on my south facing deck. I plan on having water cover plants and fish. I also plan on having the barrel elevated a few centimeters to allow air flow.
I'm located in the North West and I figure the spot I'm putting it gets about 7-8 hours of direct sunlight. Is this too much?
My plan is to get about 70% surface coverage with plants and have a couple of fish handle bugs. I've read that a 5 gallon a week water change will help keep the water fresh. If it doesn't work out, I'll probably add a small pump to keep the water surface moving.