I'm using a Beamswork DA FSPEC (24") on a 20g high tank.Lumen: 3100LEDs: 60x 0.50WConfig: 42x 10000K, 8x Actinic 460nm, 5x red 620nm, 5x Green 520nmI have it on 3 hours in the morning and 3 hours in the evening with a 5 hour break in between. I'm trying to grow Amazon Sword, Green Cabomba, Wisteria, Pennywort, Frogbit, Java Fern/Moss, Anubias and Water Sprite. I'm using root tabs and I just ordered PPS dry ferts. Nearly everything is covered in algae and most of the leafy plants have holes or cracks. There's consistently a high volume of algae on my glass that I'm daily taking off. I'm doing 25% PWCs per week. Three questions: 1) Is my light considered low, medium or high? 2) Will the dry ferts help with algae control? 3) Is it really necessary for me to use Co2 to control algae?