Mounting Arm Extension Kit 

Just as described, works well

These could be about six to eight, maybe even ten inches longer. When mounted on my cross brace (3 1/2” tall) which the 24” tall aquarium sits directly on. The adjustment screws are behind the glass and not accessible. The extra length would put the height adjustment screws just above the rim of tank and also allow for better mounting options. Currently I will have the bolts only a couple inches apart (not very sturdy) and will have to loosen them enough to adjust the height once my lights arrive. Can provide pictures of the issue if you would like to address it. Another solution would be to add six inches in length and provide holes on backside for the height adjustment set screws. Thank you