After about a month of not visiting this aquaponics system, I found the plants over-running it, which they seem to do when I don't bother them. The problem was was wasn't cycling well. Fish were okay and plants got water that wicked up through the cinder, but the ants love to move in and nest in the cinder if the water isn't rising to a flood level in the cinder bed.
The tomato sent roots down through about 8 feet of pipe and had slowed the water flow. A little roto root type work and water is flowing again.
