where should i place my clams?

[ClownNut]

i got 24" tall tank, 3 MH(175W)with 3 VHO.(2 blue supplemnt 1 10000K)... can i put them at the bottom? or should i move them up a bit?

 

[menace]

what kind of clams do you have?

 

[ClownNut]

maxima(blue) 2"
derase(white with gold) 4"

 

[MHannon]

with that lighting you can put them anywhere.