J.Mcpeak
Aquarium Advice Addict
Test tap water for ammonia.
16g is a bit on the small side for Cory p. (unless you're trying to harvest eggs!)
Short term is ok but a tank that size would need 2-3 changes per week to keep the water clean and good.
Could be osmotic shock or ammonia related issues (toxic shock)
Do you use prime or am-quel or similar ammonia binding water products?
0.25 nh3 should be 0, unless your conditioner is one of the ammonia binding types.
16g is a bit on the small side for Cory p. (unless you're trying to harvest eggs!)
Short term is ok but a tank that size would need 2-3 changes per week to keep the water clean and good.
Could be osmotic shock or ammonia related issues (toxic shock)
Do you use prime or am-quel or similar ammonia binding water products?
0.25 nh3 should be 0, unless your conditioner is one of the ammonia binding types.