Hoppy, i had Considered That Except That The Tank Was Doing Well With Little To No Ferts for More Than 6 Months. I Didnt have algae issues until I started Dosing. I Would Think That If It Was too Much light or Too Little CO2 I Would Have Had Problems Before Dosing.
Well, if the plants are strongly limited by ferts............they are not growing that fast. CO2 demand is still beign met.
If you add some ferts, then the CO2 goes up and becomes the new limiting factor.
Liebig's Law of Limitation predicts this.
Adding ferts just highlighted the dependency you have due to poor cO2.
I add 10x the ferts and have 2x the light and yet:
So we can certainly say that nutrients are independent of algae blooms even at the highest light values, if the CO2 is also non limiting.
Dosing is EASY to learn how to do. Lighting is fairly straight forward, but not CO2.
So if you have good light and ample ferts, then those are now independent factors and the only one left is CO2.
This way you can dial in the CO2 and learn how to manage and what sub optimal CO2 ppm looks like by eyeballing things. You need to go slow and progressive with CO2, do not rush and crank it and gas your fish, do small changes every 2-4 days and watch closely.
You have staghorn algae BTW and GSA.
CO2 for both, perhaps a little too low on the PO4 for GSA also, but poor CO2 will make it grow also. Excel dosing daily will retard new growth.
You have some work ahead of you, CO2 and then Excel to kill the algae.
If you run only 2 bulbs, that would be best. Less light= less CO2 demand= less fert demand.