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Iron is by all means necessary for plant growth, but problems associated with iron are far less prevalent than with nitrogen, phosphorous or potassium, the macronutrients. Iron won't affect the colouring of your plants really, except if there was a severe deficiency in which your plants may have...

I agree with what you're saying totally. You found that fine line, the balance, and you have it down to a number. That's pretty precise! You mean over 15ppm they get greener?

I absolutely agree with you about higher phosphates, but: Phosphates are necessary to provide the raw elements to create the red colouring. Nitrogen is required to provide healthy and robust foliage. In the presence of intense light, an abundance of nitrogen, and an abundance of phosphorous...

Your pictures are great! You DO have a lot of nice colour in your tank. I love your lotus, I want one so bad but my tanks are FULL and I just can't bear to fit another thing in them! High light and limited nitrates supports what I was saying about bringing out reds and colours other than...

Hello. Just thought I'd share some information on this. Plants all have the ability to exhibit red and green colouring. In most plants, the green is dominant as this is a reflection of the chloroplasts which are abundant in all plants (chloroplasts being the place chlorophyll is stored and the...