hi guys hope someone can help me i have just brought a pair of 6100s with a 7940 multi controller for my 84x24x24 system if i turn one of the pumps up to 100% i get a small alarm beeping only does this sometimes so i figured it may need a clean. problem is i did not get a manual with the 6100 or the 7940 so i am not to sure how to dismantle the pump or what sort of settings i should have on the controller. i have set the streams so they face each other on opposite ends of the tank so the flows are aimed at each other .checked on the tunze website to see if i could download manuals for the 6100 and 7940 but nothing there so i am hoping someone here can help. thanks 
