Cleaning an acrylic tank?

[holabird]

I am setting up a 150 acrylic tank and it is going to be very hard to get inside the tank. The stand is high, the tank is tall and the canopy is tall, thus very hard to reach inside. Add to that there is a very small opening at the top of the tank. That being said, what is the best way to keep it clean? I will get a mag float but will that be enough? Thanks in advance for your ideas.