You need to consider you focal point & various ratios – as your center rock looks too central and straight, however tanks that are viewable from many sides represent some challenges and suggest that you do a search for aquascaping techniques. Here is a good discussion: on
http://www.aquaticquotient.com/forum...20&postcount=1
Then view some inspirations sites to see the principles in practice:
http://www.aquaticquotient.com/forum...00&postcount=1
While you are waiting for the hair grass to fill out your foreground you may wish to consider adding a fast growing plant to assist in stabilizing the tank conditions, you can remove it later. Set-ups with only one kind of plant are hard to pull off, so you might want to consider adding another permanent plant that provides some shape/depth, more contrast and add this on the side that is closest to the wall/CO2.
Good start and look forward to seeing more pictures as your design matures & changes.
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