Ok using almond leafs will make your tank dirty ....very dirty once the leads starts breaking down in a few weeks and it will not make your ph go down that much ,,the best and safe way to lower ph and keep it low ,you will need a RO/DI system ,go to bulk reef supply and get the economy system for $129 it comes with the kitchen sink adaptor and garage hoes adaptor ,,hook up is less then 1 min ,you can also go to YouTube and search got bulk reef supply they have a step by step install videos , if you are breeding crs and CBS RO/DI system is a must ,,,sure with ph of 7.6 or 7.8 the crs will breed but after they hatch they won't live for more then a week or two ,hope this helps , I also have done videos at YouTube just search for nyreps
Check out the little guy on the bottom right