Thank you for helping! Good to know. Now if only I can dial in my dosing, I’m trying to stick to EI methods, but I end up with pretty high phosphates and nitrates after a few weeks. Not to say an excess of nutrients causes algae problems, but i do worry it gets too high.
An important part of EI is the 50% weekly water change, which is designed to help reset your nutrients so that they don't get too far out of line.
Having said this, I don't use EI anymore (many of us are moving away from it). My belief is that EI is more suited to high tech, heavy plant-mass, tanks and can make things much easier for beginners having such setups. It's just a way to ensure sufficient quantities of nutrients at all times. Once you get your plants growing well, you can decide whether or not to continue or, as you gain knowledge/experience, start to fine-tune your total inputs (nutrients, CO2, light, flow, etc).
Another fine way to go is the PPS system, which uses far less nutrients.
Both systems can work, but neither is a guarantee against problems. As problems appear, you can address them as needed and seek help on this forum when you can't solve it yourself.