Modifying Reactors

I have a next reef MR1 laying around that I have decided to modify to a recirculating reactor. I have a question about drilling the cylinder. Do you have to use a step bit, or can you use any bit to drill it? I'm looking for a clean drilled hole.
 
The last few i seen modded was using the cap and not drilling in the reactor body... Any bit will work in my experience with acrylic

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Yes. Any bit will work but the step bits make things easier. Can get them from harbor freight pretty cheap. Harbor Freight also has a 3 piece PVC NPT tap set so you can tap it for 1/2 fittings.
 
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