I have a well-established aquarium, freshwater with live plants and lots of gravel snails and the like. It has a biological filter system with no under gravel filtration. I was wondering if I should clean the gravel? 
We have an abudance of undergravel snails that have assisted with the biological setup of the tank, but I'm not sure that I should leave 5 years of accumulated waste. If I do clean deep into the gravel it would be a huge and possibly unnecessary undertaking.
Any help with this that anyone can offer is very welcome.
We have an abudance of undergravel snails that have assisted with the biological setup of the tank, but I'm not sure that I should leave 5 years of accumulated waste. If I do clean deep into the gravel it would be a huge and possibly unnecessary undertaking.
Any help with this that anyone can offer is very welcome.
