In the 1st tank we bought (a 55) we bought the gravel that was reccomended to us and its a really fine natural looking gravel but the problem is when I go to clean it and If I'm not paying attention I end up clogging the python. So what I was wondering if it would be harmful to switch over to a larger size gravel ? In our 75 and 90 we have larger gravel and I have no problem not clogging the python in fact I don't evevn have to pay attention to what I'm doing Oh yeah we have 2 small EBJDs in the tank started with 5 and I've noticed they act alot different than JDs seem to be more timid and don't want to lose these 2 guys