algae growth?

Hey there SpiderDijon, so in general algae growth is nothing to worry about, usually it just means there are moist conditions in the medium, plus when they die off they release nutrients , right? but to get back to the real problem i think you're right about the stunted growth. Looks like N toxicity to me, that's because of the shiny aspect and dark green color of the leafs plus a bit of the burnt tips. That's because a lot of what you're adding contains N , and probably at this stage it was too much. The plant can survive, try cutting out everything except one of the calmags which has N and the micro the plant needs at this point. But normally you do want to start again from zero because most of the time when the plant gets a shock at this age it will be stunted and grow slowly for the rest of its life. Sorry, growmie. hope this helps ! 🚀