i have a shrimp tank. 28l. i started with 10 baby red cherry shrimp. the females are all in berry and are doing great. a friend of mine gave me a single crystal red from a tank that had crashed. he also has come on leaps and bounds in the two months ive had him. so i went ahead and got 10 more last wed. they have all settled in and are starting to colour up nicely.(they were a bit pale from the shipping when they arrived.) so my tank ph 7.2. and i read that crystal reds like it a little lower so ive got them some almond leaves but im not sure which is the best way to use them.i know they can stain the water with tanins and lower the ph. how drastic will the ph drop be. i don't want to stress them whilst there doing so well. any advice would be welcome. thanks.