Depth?

[Demi ^_^]

Okay, well my 22g is:

30"L x 12"W x 14"H

I am wanting to plant my tank - gradually going up to heavily planted - what are some ways of placement/etc that can create more depth to a tank?

Thanks guys :-)

[AABatteries]

Have the substrate slope. Horrible illustration below.

Side of tank:
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