Well done; they're looking good
I don't think it's possible to do too many water changes with growing fry; and leaving the lights on for 12 hours would only be detrimental if you didn't want any algae growth; as you do, it's not a problem
I don't think it's possible to do too many water changes with growing fry; and leaving the lights on for 12 hours would only be detrimental if you didn't want any algae growth; as you do, it's not a problem