Flicking But No Spots

[CrystalClear16]

It is a 125L (I know they will outgrow this - I am upgrading the tank as they grow. They are currently only 2" long and I expect this tank to last another 6 months before I go bigger).

6x Clown loaches
6x Neon tetras
6x Cardinal Neons
5x black neons
6x mollies

API test kit.

The clown loaches do not look thin or have bubbles. They are eating and generally behaving normally. They seemed to flick less yesturday, only once or twice. As I was at work today I couldn't see but I haven't seen them do it this evening so far.

 

[WILDER]

If flicking increases get back to the board.

 

[CrystalClear16]

They are still doing it a few times a day - but there are no spots, the tests are all normal and it doesn't seem to have increased. Could they be playing? Over the past few days I have also noticed them swimming right in front of the filter outtake - taking it in turns€ to get as close as they can before the current is too much!

 

[CrystalClear16]

*bump*

They are still flicking quite a lot - help would be appreciated!

 

[Skins]

Hi, Just a stab in the dark but has your pH levels changed?

 

[CrystalClear16]

The same. My PH has always been tricky to pinpoint though. When I use the normal PH tester it comes out blue for 7.6. When I use the high range tester it comes out tan for 7.4! So I imagine it is between the two.