Is the redness normal?

[Ally_pru]

So I have had my Lucy for 4 months now. She normally gets really pink around feeding time from being active, but the past few days she’s becomes veiny and red at feeding time. It’s back to normal white by the next morning. I attached a pic. Is this normal? Parameters are perfect.

 

[Axolotl Queen]

Hi,

In order to rule out all possibilities can I ask a few questions.
Firstly, what are your exact water parameters? What temperature is your water? What dechlorinator are you using? If possible can you take a photo of your test tubes next to the sheet as sometimes even the best of us can miss small things?