Help! Something Wrong With My Angel!

[CrItIcaL]

hey i hope someone can help me...

my 1 angel fish has gone crazy... it sits dead still in the tank just floating normally doing what angel fish normally do and all of a sudden jerks to the corner of the tank in a plant and sometimes digs into the gravel... until its stuck in the plant or in a space where it cant move then i have to free it then its all stressed out fins flapping and heavy breathing...

then he just goes back to normal.... his in a breeding tank with another angel fish that does not even swim fast...

whats going on...?

they've been in the breeding tank just over 2 weeks now... last water chance was about a week ago.
i don't have equipment to measure ammonia or nitrates only P.H. but thats 7.3 exactly the same as the tankl they were in before i even used 3/4 of their old tanks water... then toped up with dechlorinated water like usual and did a water change a week ago like mentioned above... water temp 27 degrees C....

any help or advice would help..

thanx

 

[WILDER]

Need water stats to see what going off.

Any signs of darting, excess mucas, red inflamed gills, erratic swimming, laboured breathing, being pale,
darker in colour, resting to oneside, swimming in a jerky movement.
What does it look like when he goes to the toilet.