| | Re: Lighting question
I'm surprised that you can't get red color with your lights. Higher light intensity usually increases redness, at least from what I've seen. If you've already tried different bulbs, photo period, and different fert ratios it must be something else. Do you think it could be caused by either a lack of iron or an excess of nitrates? Some people think that iron levels dramatically affect red color in plants, so you could try dosing some extra iron and see what happens. Some red plants also color up more when the nitrate levels in the tank are low. Have you tried either of those?