Remodeling

[dabudkrew]

i am planning to add new sand in with what i aready have and since im doing this i wand to move some rocks around, is it safe to do this with fish in the tank? i was told to use a pvc pipe when adding the sand and im not sure if i should let it settle before moving rocks around or should i put most of the rocks to one side and do the tank by parts? are there any risks doing this? anyone with some good tips? thanks

[urban79]

Just watch your Na. and Ni When you take your rock out. Your going to put alot of air and kill alot of things that are living in the rock. That your tank is needing.