Would you suggest an aluminum-compatible radiator cleaner over plain water?

Great set of instructions! I used clear polyvinyl tubing instead of heater hose. I suspect the low-phosphate coolant is prone to plugging the heater core, especially with any air in the system.
Would you suggest an aluminum-compatible radiator cleaner over plain water?

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[Kerry at Pelican Parts]

I actually believe it is the impurities in the water that causes the corrosions that clogs the heater core. I've had some sucess with comercial grade plumbing cleaners unclogging the heater cores but you have to be careful to only leave it in a few hours or it will create a leak in the heater core.

- Kerry