Testosterone is a hormone that is produced in large amounts by males (and a little bit in females), in the testes and adrenal glands. High testosterone levels are associated with sexual performance, reproductive function, muscle mass, hair growth, aggressive, competitive behaviors, and other such manly things. Testosterone levels tend to peak at the age of 40, and slowly decline from there. Luckily, there are many things you can do to increase testosterone, so if you feel like your T levels could use a boost, you've come to the right place.
Okay, this is not really a fertilizer. But maintaining optimal pH (a measure of the acidity or alkalinity of the water) is one of the most important metrics that affect the availability of nutrients to your plants. The ideal range of pH for the nitrogen process is slightly alkaline ( to ), whereas the ideal pH for micronutrient availability is slightly acidic ( to ). The lower pH can impact the efficiency of detoxifying ammonia to nitrite to nitrate. Stabilization of pH between to is paramount in managing the health of plants and fish simultaneously.