The setup completed; tank, vortex sediment tank, gravelbed
A closer look at the plumbing. The sediment tank is about 70 liters hence roughly 1/3 of the fish tank. To avoid the tidal effect from pumping up and down with the timer, I've installed a check valve so that water from the sediment tank will not return to the fish tank. However, since the check valve works with a spring, it robs a bit of the head (power) from the pump. The 39W is just sufficient for this system that we did not have to utilize the bypass to regulate water flow. If they expand the system, which I think they will, they'd need to change it to a bigger pump a 60W perhaps.
The Affnan Siphon utilized in the gravelbed. Shown in picture is the larger diameter media guard and the smaller diameter bell.
A look inside the siphon. The reducer which converge flow and promotes the initial start of the siphon.
The tailpipe or the outlet of the siphon.
Gravel filling time! I sure am glad I was spared from this back breaking job. Farid the casual worker was really helpful during this part of the job!
Sandesh and Ranjit, father and son are now the proud owner of an AP system! Will check on them in a few weeks!