Also, Algy does uptake nitrogen, which should be provided to your roots. Some Algae produce even harmful toxins for you and your plant. My tip for you is, let the plants dry out before you water EACH TIME grow this round to an end, and wash the pots with alcohol after this run, dont take H2O2 or chemical cleaners, as these will probably stay in the pot and harm your plants on next round. You will see how much benefits drying out your plants brings as cannabis is not loving too much water at all, will reduce your RH and you need less air rotation which saves electricity. But for now, keep temps and air rotation high, to get you plants dry out and start just water every 3rd time you would water. You will be surprised how little of water this plants actually needs. Good indicator is to see the leaves dropping and beeing limply. The plant also does create more ingriedients, hormones, acids, etc. So don't fear. Some people treat their plants like babys, making them need nothing, how strong will such plant be? and how resistant? You can see in modern culture, that plants are loosing most substances because they are fed the littlest shit and are inbred till they lost all good stuff..
Wow this turned into a journey..