I’ve responded through support for this one, good luck @Hainesjr1.
This one is a bit more of a concern @Dew, not a beneficial bacteria, more like root rot slime or cyanobacteria. It will harm your young plant by suffocating the roots. I recommend Botanicare’s Hydroguard to help fight off this nasty stuff. If in Canada, applying Hydrogen Peroxide to your reservoir is your best bet, can’t get Hydroguard here.
Go to Botanicare website punch in the information for the feeding chart based how many gallons our tank is and it will tell you…I wouldn’t worry about burning the plant as it’s beneficial bacteria helping to break down organic matter … not a supplement as far a nutrient goes… just dump it in the reservoir when you drain and fill and add like a cup or two of water
Believe it’s 2.6 gallons
Upon high fill you are looking at 11 litres (2.9 gallons), so I’d add 5-6 ml per drain/fill.