fertilizing

Some of leaves have yellow spots.I dose API leafzone on a weekly basis and flourish excel on a daily basis. I have 2 13W CFL illuminating my 10 g. Any ideas why they are getting the spots? Suggestions and advice welcome.

The growth rate of plants based on the external amount of nutrients Acknowledgement This experiment would not have been possible without the contribution of the following people: [Czech Republic]: Prof. RNDr. Hana Cizkova PhD., Jiri Novotny, Josef left, Jan Jaburek, Martin Styrak, Luke...

Hi guys, I know many guys here have years of experience keeping planted tanks and over the years have experimented with different fertilizing methods. So my question is in your experience what is a good estimate for the ratio of usage of different macro and micro nutrients. Please note that I...