im running 2 wpg for 12 hours with no co2. Plants are amazon swords chain sword and java ferns. Along with one wentii crypt. I don't dose with anything yet but i have both iron and another fert. Both these are at my other house which i will be returning too this weekend and pick up. Oh and i also have this reddish algae (at least thats what i think it is snice ive had swords for years and never seen a red one) that is covering the amazon swords, just a real thin layer. The hair algae is green.