I'm going to be swapping my 65 gallon out for a 180 gallon. I've got a lot, possibly too many plants currently haphazardly planted in my 65. I also have a moderately stocked amount of fish for this 65. I am increasing tank size so my wife should, in theory have less to do husbandry wise, while I'm gone for a long time. I build up nitrates with my current stock even though I have a bunch of easy, fast growing plants. The 180 will be a dirted tank of mixed topsoil, organic garden soil, and flourite, capped with nat geo sand. Cant say enough good things about the sand, and the organic soil is manure free and I already sifted it so should be minimal issues there. Currently dosing nilocg 2 bottle all in one supplemented with a double dose of seachem aqua vitro propel for ludwigia and scarlet temple. I have medium ish lighting with 2 led bars. They will be split for the 180 since I'm doubling my footprint, so basically 1 6 foot light instead of 2 3 foot lights. It's too much light currently, but growth for the most part is great. Shouldn't be an issue in the 180. Questions: 1. I do have a bunch of red stem plants. Some are thriving, some look burned, (still playing with exact dosing levels,) and I want to mix up a mega ton of dry ferts so all my wife has to do is toss a baggie into the bottle and let it do its thing. Is there a general, common recipe? 2. Can I omit the potassium nitrate altogether for now since I accumulate nitrates currently anyway? 3. Can I add a bunch of extra iron chelate to the mix since all my plants live it and my red ones always seem to want more? (So much so that I add a double dose on micro day and they are maybe barely as red as they might should be, not enough that they are as brilliant as they could be.) 4. Can I put double doses, (or even quadrouple,) into the bottles to make it last longer in such a large tank? Edit: No co2 will be in this tank. The idea is to make my wife's life easier. The only reason anything survived last time is because I had the toughest golden wonder killifish of a tank. I wont have her messing with co2 and timers hoping to avoid nuking the fish, or plants growing great until the bottle dies and she doesnt realize it for 4 months.