in order to be buried at least two feet deep for insulation effect.
the over all height of the media beds...
one under each bed, all cross connected, each progressively
deeper that the other one so that the main sump (which
houses the pump) was the lowest point of the sumps to ensure
plywood for the bottom.
Strong recommendation on completely testing the plumbing
before you put media beds in place. Trying to work under the
beds in tight spaces will surely make you appreciate testing ahead
have it connected to the fish tank yet. I used 1/2" crushed
granite ("Texas Pink") which when wet looks very pleasing.
Notice the panels on the front which are left over fence pickets
cut and stained to match the fence behind the AP system.