I have a 90G and 75G tank keeping South American Geophagus, I am using 3hang in the back filters and want to upgrade to use Cannister Filters. But I have a concern about the Cannister Filers will suck the sand(I use pool filtered sand) and got damage.
I prefer to keep using sand as I like to see the Geophagus shifting the sand for food.
I prefer to keep using sand as I like to see the Geophagus shifting the sand for food.