Well 2:30 am ended up doing emergency 75% pwc
The tank hadn't all the way cleared up from the pwc
the day before, so I started looking around it and saw some gunk in a corner area which wasn't getting circulation from the return from the FX-5. So I tried moving the directional spout and it fell of making a little cloud of gunk.
Then I decided to check the flow on the intake and it seemed almost nothing.
I popped off the intake screen which is about the size of my hand and boy did the water start moving.
But it let loose a HUGE cloud of particulates making the tank look like a little swamp. There was a glob of slimy gunk that was blocking the neck where the two parts connect and knocking that loose caused an even bigger cloud of brown stuff, the tank looked like a brown mess.
That glob was hidden in the center and not noticeable by just looking at it. aargh!
That explained how the fish haven't been looking so good the last couple days.
Well opening up the flow on the FX-5 really cleaned out some build up I guess.
So gravel vac'ed the harder to get to areas - had already done the easier to get to areas.... and oh goodness have I not smelled such a rotten smell.
WOW!!! I had to open the door to air out the house. Refilled to about 2/3 and let the inflow aerate the tank better.
So now about 7 hours after the water is crystal clear and smells sooooo much better.
Still need to decide when to clean the FX-5 out...and buy a new bottle of Prime!