the sand is 1" when spread out evenly in the tank and i do try to move it around often. My ph is usally low should i try to up it? Can a low ph prevnent growth of benificial bacteria ? or crash
Depending on how low it is yes. If your tank cycled fine at 6ph and it is steady I wouldn't mess with it. My main concern was that it was lower than 6 and the water changes you where doing might be bringing it back towards 7.
If your ph is always steady at 6 you might want to do a good search of the tank and all filters for something that could be rotting and throwing off a lot of ammonia. Like a large piece of food or dead fish in a decoration or filter