i've had vals for over a month now and they're still melting, even the new growth. new leaves would come out about 2 inches and then the tips would start melting. has anyone had a problem similar to this? i have a 10 gal, 15w t8 bulb on 10hrs a day, i dose equilibrium, KNO3 and KH2PO4, no co2 and no excel. substrate is flourite. do i have the lights on for too long? i have java fern, java moss, crpyts, bacopa, ludwiga, and other plants that are doing fine, its just the vals. thanks.