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I would say the same thing. From the last picture it seems to have decent surface agitation. I personally think they all look to be around the same level in the tank. I think having at least one higher would be better if return pump goes out having a power head breaking the surface will greatly reduce the chances of oxygen deprivation. Also maybe bringing one down to get more flow over the sand, but not so low that it moves the sand around a lot.Welcome, glad you are here! Make sure you have a wave maker pointing towards the top creating surface agitation to increase gas exchange.