Thumbs up for ultrasonic record cleaning

@prof 

I'm glad there's a choice for us all. The main point is you're experiencing the benefits of US cleaning.

Well I’ve had the 5 micron filter in for a couple weeks now. I’m realizing (what I referred to as hairs or fibers earlier) now that the "slurry" that settles on the bottom of the tank after days of no use, is just that. I watched as I turned on the pump and started leading the output hose around the tank. Getting close to the bottom I can see that "slurry" being moved up into the water and then looks like fibers or hair.

One of the upsides of this set-up (or downsides of my Audio Desk) is I can see and clean the tank. With the AD, one is very limited in this regard.

So after two weeks with the 5 micron filter (complete water change), the water still looks clear. In the past, after several weeks, the water generally looks cloudy,(yellow). We'll see.

I'm now convinced with my current tank, (with it's placement of the internal water outlet and size), I need to get a larger output capacity pump to address my concerns. This will be the easiest, most cost effective way to go forward. 

For those of you with an Elma or similar unit, how is the design in this area. Maybe, like a household sink, the water outlet should be in the center of the tank?

@Slaw - Which Elmasonic machine do you use?  On the Elma P120h there are two rows of three transducers organized on the tank bottom.  I suspect that placing a drain in the center of the tank would disrupt that layout and possibly impact dispersion of the cavitation action.-

One idea is to run your pump/filter for 10-15 minutes prior to starting a cleaning session or alternatively do that every week whether you clean or not.  Another is to use a TDS meter to gauge water/solution purity. 

I don't know the layout of your setup.  Presumably you have the pump prior to the filter(s).  Not questioning your approach, I'm a bit surprised at the need for two filters.  Which cannisters do you use?  I switched to a .35 micron filter.  Have not seen the condition you describe.