Mine didnt come with the MJ1200....at least I dont remember it doing so.
The MJ400 on my older reactor was more than sufficient for my use. So long as you can dial the pump back, the MJ1200 is fine. i recently fitted a unit with the MJ1200 and used a valve inline from the pum to the reactor to help regulate flow.
P.
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Paul W Whitby Ph.D
President Central Okla. Marine Aq. Soc.
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