Perhaps the answer to your question is in this picture. Not always fertilized with the same dose of K or PO4, Mg, NO3..etc, etc. I do
Hey AC. I've come into possession of an apple snail that was found behind the tanks in a pet store, quite dried out. I threw him into a five gallon tank
Livebearers typically have shorter lifespan then egglayers. Guppies are about 2-3 years, platies are about only 4+, and Mollies a little longer.
It's entirely possible that they (live bearers) should have a longer lifespan and we kill them prematurely. WE have koi and blue catfish in our outdoor
craploads of expensive plants for culturing (ex. 3 Madagascar lace plants!!!!) and countless otocinclus to keep the tank and plants in top condition.