My blood red parrotfish is not able to eat and is vomiting?

Sheetalgupta._

Registered Member
Nov 8, 2019
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I have 2 blood red parrotfish in 47lit. Tank. The younger fish is getting weaker and inactive while the bigger fish is eating less and continuously chasing the younger fish. I tried feeding the younger fish peas (crushed n softened) and also fish food but its puking it out.
 
~12gal isn't nearly enough tank or water for two parrots. What are your readings in PPM for ammonia, nitrite and nitrate?
 
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