Clarkii clownfish acting weird

[Jrid1997]

I purchased two Clarkii clownfish about a month ago I believe they have paired up. All my water parameters are normal but my two clownfish are at the bottom corner just swimming and maybe biting the glass one is vertical just swimming rubbing it's belly on the glass. All my other fish are fine

 

[g_langley]

my two clownfish are at the bottom corner just swimming

Normal behaviour. You can try adjusting the flow. I had a PH at the back pushing toward the front, since then I changed the flow to the front of the tank - left to right - and now the clowns swim in the middle!