Ok, maybe I am alone here, but if they are drains, they will have some kind of suction and will pull your substrate in.
Modifying tank drain
- Thread starter PMK
- Start date
cut them down to 1" past glass level then silicon some mesh over the holes and you'd never need to gravel vac again, or syphon for that matter.
PMK;1611614; said:
My point was the water will flow through the substrate, to the drain, without a problem. the cages will keep the substrate from entering the drain.
I didn't mean to imply you would ever use such a device
