I'd go with "mild-growth" or "growth" schedule and keep your eye out for tip burn. Make sure you have decent ventilation and don't keep the lights too close. 1 small CFL about 2-3 inches above should be enough for now. Also, switch to 18/6 light cycle. I find 24/0 is beneficial only if the plant is in 100% health. What's the pH level? how often do you change the solution? Do you have enough bubbles? What is water level like?
Perlite should be ok. It's actually a great medium in the right setup.