Here is my latest adventure. I tested my nitrate level.. It has been 100+ for months. Today after fighting with it, I removed ALL of the gravel from my tank, did a 50% water change, and the nitrate test was still bright red! Which is around 100+. What am I missing? My big piranha has anchor worms and am waiting on the medicine in the mail. I assume these were caused from live feeders and poor water.