Bacterial bloom

[SevenOFour]

Hi! So I just experienced a bacterial bloom. The day before it happened, I did a little under a 50% water change, could that be the cause? Or maybe my filter? My axolotl is pretty small right now- about four inches, so I’m keeping her in a ten gallon. I have a ten gallon sponge filter with it, though is that enough filtration? Should I get a larger one/better filter? Any brands in particular? Thanks!
(All of my tank parameters are fine, though I’m worried about the ammonia spike... any way I can reduce this?)

 

[strawberrie]

I would get a larger filter, they can be pretty messy. Otherwise you could do water changes more often or clean the tank out more often. Some live plants might help too!