will lettuce work?? (Feeding LMB)

[fish keeper32]

#ed_op#DIV#ed_cl#I finally got the lawn mower blenny i've wanted and hes doing fine! he ate all the green algae already tho and he seems to have no intrest in the flake like i was hoping. I've got this frozen diet i will try but it floats so its hard to get it passed my clowns. So the only other thing i can think of is the lettuce. Will this idea work? Also when i bought him he was white with dark grey spots now that i've got him in his new home hes almost pink on the bottom! and his spots have faded to a light grey Exactly like my substrate's color! Do they actually change color or is it just the combination of different light and him being next to a different colored rock?#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#THANK YOU!#ed_op#/DIV#ed_cl#