I don't know the answer to your question. However, I think it all would depend on how much light you have going and how heavily planted your tank is. How much would your mosses need to compete for nutrients? Co2? It's difficult to say. I dosed EI for the longest time and was constantly battling algae. I switched back to the Seachem dosage chart and dose 1/3 the recommended dosage and everything is flourishing with very minimal algae. Once in a while a bit of BBA shows up on some of my anubias and I blast it with some Excel at water changes and it goes away. I have mosses growing very well in my 12g heavily planted tank which I dose (very little) and add co2 1 bp 3 seconds. I also have mosses growing very well in low light, cool temps and good flow. I keep the flow directly over the moss which I think helps it alot. Most of this I found out by trial and error.