hi dealt,

I'm no expert but It looks good to me. One thing I notice is the depth of the sand is pretty high, so the volume of sand to water is a greater percent. Recently on my 29g I put sand in the front but only enough to cover the bottom, maybe 1/2" deep. I like the visual effect of the sand, plus my blue rams really enjoy grazing the sand. Less depth of the sand and substrate also allows for a greated water volume or more room for rocks, wood and of course plants. The lesser volume of sand in relation to water would possibly result in less of an effect on the kh? Just some ideas I thought I'd share. More than likely time is the only way to tell if it will actually work or not.

Kai