Yep, when the LEDs arrive I'm going to flush the system with some white vinegar and then fresh distilled water to ensure all the "crap" is out of the system!If poking it just unplugged the opening of crud, the crud is still in the system.
If I was able to see down into the tank I might want to suction it out with a rubber bulb or a siphon. Otherwise it will possibly happen again.
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