bangbangkhan
Reefing newb
Are check valves really necessary for the return pipe? or they are redundant?
Thanks
Thanks
Yes, but often the sump is smaller than the display so a couple of inches of display tank water could be several gallons, while the capacity of the sump may not be able to hold that much back flow. If you go without a check valve then make sure your sump can handle the amount of back flow before the siphon breaks. I have my return nozzle right at the water line so when my pump shuts off very little flows backwards before the siphon is broken.
Make sure to aim the drill upwards so that water flows downwards through the holes. i neglected to do so and water sprayed at my ceiling! I also think I made my holes too small.