After a water change my freshwater angel fish are gasping for air, what should I do?

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Some background on my tank setup. I have a 22gal. freshwater tank. I have the same setup for the past 8 months without any fish deaths. When I first setup the tank, I had too many fish, and the tank seemed to mellow out after a few deaths and has been constant ever since. I clean it about every 4 weeks to a month.

Items in the tank include:
4 Ghost Shrimp
4 Tetras (2 of the same type, and 2 other mixed)
2 Small Angel Fish
3 Plants
2 Pieces live wood

I keep the temp around 75 - 80.

Today I did a full cleaning, dropped the water to 60%, vacuumed the rocks, brushed the glass, checked the ph and ammonia levels.

the ph and ammonia needed adjusting, so in a 10 gal bucket, I added two ammonia removal tablets, and one ph balance tablet. The reason i added two ammonia tablets is that they are for treating 10 gals of water, and since my levels were already high in the water and I was adding about 10 gal of tap water this seemed about right.

Since I did this cleaning the tetra's and shrimp seems to be fine and adjusted, but both of my angel fish are swimming around all weird, mouths keep moving, tipping over a bit, and staying at the top of the tank like they need air.

Is there any need for alarm? or do they just need a few hours to adjust to the new water? Thank you in advance, and let me know if you need any more details to answer the question.
Just a note, the Ammonia tablets I used are made by Jungle and are called Ammonia Clear®, the box says they remove ammonia, chloramine/chlorine. Also a quick update on the fish, they seem to be doing better and not hanging out at the top as often, but a few of the tetra's seem to be chasing them around the tank.

@xk, i only have two angels, not 3
 
I will just add the the rest of the answers by saying that angelfish will eat those tetras and ghost shrimp when they grow big enough to do so. You should watch out for that. Good Luck
 
Hopefully you didn't forget to dechlorinate the water. If you did, put it in immediately.
Did you make sure the wter temps were the same b4 you added the new water?
A water temp change of as little as 2-4 degrees can shock the fish and kill them.
 
ok... ammonia = bad you obviously know this... what you haven't realized, is that switching and changing your ph levels around can really mess with a fish. it honestly doesn't matter if a fish is happily living in your tank at a ph of 7.6 and it is recommended that it should be living in a PH of 6.8... or whatever... your fish (in this case the angel fish) have adapted to a new PH level. it becomes stressful for a fish when a PH level is changed, even by a few points...it's HUGE for a fish and can really mess them up. this is probably why your angels are stressed. once a PH level has established itself in the tank as a norm and the fish you have are fine with it...LEAVE IT ALONE!!!!! not only does the shift in PH stress your fish, but the chemicals used to "balance" your PH are so temporary, you're constantly fluxing. I'm sorry if you feel like i'm lecturing you... i'm not. i only figured this out thru trial and error myself, and lost a few tanks of fish meanwhile. hopefully your angels pull through, and monitor their water parameters a little more often than once a month.

good luck and i hope everyone is ok
 
Well..I could always use more info.
But Just wait a few hours, if they dont adjust, something is deffinately wrong with them, they might have had a shock to the water, try researching it or asking an expert on it
 
The fact you had ANY ammonia reading is a sign that your tank wasn't balanced at all. In a tank like that you should have been doing weekly water changes of 20% at least not once a month. Lightly stocked tanks, yours isn't, can get away with fortnightly changes.

"Ammonia remover" doesn't really remove ammonia, its still technically there, only partial water changes will remove it and your tank will probably have to re-cycle.

The big water change may well have effected the bacteria in your filter, ensure you did dechlorinate as chlorine will kill that bacteria. It can also shock fish, which would also cause the same behaviour you are seeing.

Another smaller water change, take daily water parameter readings until ammonia is 0 and holding. The only safe level of ammonia and nitrite is 0.
 
first off the tank is going to be to small a 30 Gallon is pushing it for 3 angels. so i'd upgrade to a 30.

Also Angels do sometimes randomly die, Angels are notorious for random death.
 
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