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Deleted member 143833
I solved this (at least 99% quieter) by placing a small sliver of airline tubing between the soft and hard washer of the impeller. I noticed how large the gap is between the ends and hard washer so closing this gap even a little lessens the amount of travel the impeller moves when going from full off to full on. I kept the hard wasker next to the magnet and impeller as I fugure that is best for the moving parts to spin on. Assy order is as such:
end cap | hard washer | magnet/impeller | hard washer | airline tubing | end cap
Important to note that you DON'T want the assembly to be tight; I allowed a small bit of movement on the shaft which makes an ever so slight click but it is hardly noticable after adding the silence mounts (which are great by the way!).
Note: this is not sanctioned by Tunze but I've been using it for a while and the difference in sounds is astonishing; when I run the pumps 0/100 there was previously enough click to hear it quite loud and it made my fish jump and with this mod it is undetectable and fish don't jump.
FTI: I use 0/30 during feed (1 min @ 0 and 5 sec @30) to keep food moving and once an hour I pulse 0/100 to flush things.
end cap | hard washer | magnet/impeller | hard washer | airline tubing | end cap
Important to note that you DON'T want the assembly to be tight; I allowed a small bit of movement on the shaft which makes an ever so slight click but it is hardly noticable after adding the silence mounts (which are great by the way!).
Note: this is not sanctioned by Tunze but I've been using it for a while and the difference in sounds is astonishing; when I run the pumps 0/100 there was previously enough click to hear it quite loud and it made my fish jump and with this mod it is undetectable and fish don't jump.
FTI: I use 0/30 during feed (1 min @ 0 and 5 sec @30) to keep food moving and once an hour I pulse 0/100 to flush things.
