Thanks Bill!
Oh boy...I'll never reach that point!
But, I did check my water before I did a water change tonight pH (this test is really hard to see because of the shade of blue) but anyway somewhere between 7.2 & 7.6 more towards the lower one though: ammonia - 0, nitrites, 0.
As far as the filter, I did take that & give it a cleaning tonight too. I had a post about this sometime ago, the way the water was flowing out of the filter. The flow is coming out on the side that the intake tube is on, it was just a trickle but then more, so I cleaned it because the last time I did it stopped it, but this time it didn't! Gee, hope you understand :-? :-?
Anyway, I'll try to keep an eye on my fishies and if nothing else develops I may to 1 more change tomorrow then see what happens.