OP
OP
It’s a really good point on the under gravel filter with stuff like this not sure it’s for me as the cichlids will dig a lot and I’m using very fine sand. Plus the rocks will be stacked so won’t all be near the substrate. Definitely going to seal them up just need to fully work out howI don't really know but would think that hollow deco could cause the possibility of a lack of water flow causing pockets of stagnation. I don't worry about this aspect in relation to my fake hollow tree trunk that I use as a cave system as my under gravel filtration causes water flow through the thing. LOL! NO! I will probably never stop promoting under gravel at any opportunity.
