Hello there! My name is Guillermo and im from Southern California. Im new to this community, and, to fish keeping too (started december 2021). Im starting a new 120 gallon tank(i currently have a 20gallon) and i would appreciate any advice in regards to fertilizer. Im planning on filling a few large bags(similar to the ones that hold matrix) with fluval stratum and laying them on the bottom of tank, then adding my colorado small pebble substrate to aquire the 2-3inches of depth im aiming for. My pH of my tap water is around 7.4. My question is, since i know the stratum will lower my pH, how much crushed coral should i add in order to balance it back up to the original pH im aiming towards(7.4/7.5)? Is this 100 percent trial and error or is there some kind of baseline i can use. For example: x amount of crush coral for every x amount fertalizer, etc? Thank you all for your time and I look forward to being part and contributing back to this community!