Hi all,
I am planning on changing the substrate in my 2gal nano from crushed coral to fine sand.
Concern:
The water in my tank sinks through the substrate to an undergravel filter and a bulkhead in the bottom of the tank. This bulkhead leads to an eheim cannister filter.
Question:
Right now, the water drains throught the crushed coral as fast as it is pumped back from the return line. If I go to a fine sand, will that slow the draining water down too much? If the water can't drain as fast, it will slow down my circulation rate and might even cause my filter impellor to cavitate... right?
I appreciate any opinions that you can give.
Thanks,
- Chad