I used to vaccuum the gravel but I realize this could be sucking up the organisms living in it. So how would I change the water? Would I just scoop some water out randomly and then dump water back in?
When i do a water change i usually just clean the glas before i suck any water out. if you like you can slightly go over your substrate to pick up anything you see that should not be there.
What kind of substrate are u using ???
Your clean up crew should mostly take care of the sand for you. If you have a deep substrate then its inportant not to disturb it and just let your CUC take care of it. Keep in my a gooc CUC ( Clean up Crew ) Is Key.
So just suck bad water out and slowly pore in new water and try not to disturb anything.
Me personally i like to use a turky baster and blast my rocks a bit while im using my syphon house to suck all that nasty stuff out. I turn all my power heads off and pumps that way it does not go everywhere and i have a chance to suck it out of the tank.
I used to vaccuum the gravel but I realize this could be sucking up the organisms living in it. So how would I change the water? Would I just scoop some water out randomly and then dump water back in?
I ordered about 40 nassarius snails from liveaquaria and they were TINY. Like 1/4-1/2 of a centimeter. Those were the regular kinds. Should I order the super tongan nassarius snails next time instead?
Actually there is a possibility that I have very small gravel. Like not the huge kinds, but its like really tiny rocks and stuff. Not sure if this is still sand. But a watchman goby can still sift it though right?