Hello fellow fish keepers
I have my new tank I'm setting up at the moment a slow process
I am wanting to put a undergravel filter witch is a 40 Gallon Size: 119 x 29cm
here is what I am thinking off from Hollywood fish farm
http://www.hollywoodfishfarm.co.nz/detail/view/clear-n-clean-undergravel-filter-40-gallon/m/998/
My tank is 122cm wide 45cm high 44.5cm deep and it has bracing on the bottom the photo shows it
as you can see it starts about 40mm in and stops 40mm from the sides
and if I put it in their I would have to sit forward or the pipes will be on a angel
I was wondering what I could put underneath it I was thinking sand to make it flat or just the stones they are 3mm to 6mm witch is the better option
my other question is how well do they work are they worth it