Until now, I fed my 1-3 in Ds salmon,shrimp and frozen worms. They seemed to be growing slowly, now I realize my backyard has more earthworms then the entire State of California, I want to know is a steady diet of earthworms(about 10-20 a day per fish) good for them and will I notice faster growth? I am also able to do more water changes, about 50% a week with about 13 gallons changed every other day for sand cleaning.