22"

[[17]shawn[17]]

i currently have a 20gal with my 2 crocea clams on the sandbed im looking to upgrade to a 30tall witch is 22" tall

i have a 10k 150w MH and 2x t5ho would this be enough light to keep these guys happy in a tank that deep,of should i just stick with the 20gal

 

[a4twenty]

i would think they would be fine under the 10K MH, even down on the sand, but if you have to you could just move them up. seeing as you're already going to have to move the clams, you could just place them up on the rock work. then they can be closer to the light and you get the larger tank

 

[urchinkiller15]

If you move them to the 30 tall you should put them higher up in the tank and not on the sandbed.