Update On My Cycle And New Problems

hey

My cycle has finished  xD yay!

So my cycle finished Thursday last week so Saturday i put 6 angels and 2 plecs in the tank and iv run into a few concerns.

The angels keep going to the surface and look to be eating/gasping at the very top. Its never all 6 at once tho and appears to be at random times and with random fish. Right now there are 2 angels at the top gasping and 4 at the middle/bottom completely fine. it never happens to just these two tho its completely random which fish are at the top.

I have a 1000 L/h filter with a spray bar positioned with 50% out of the water and 50% in pointed at the surface. I can see that there is surface agitation on at least 50% of the surface the other  50% has movement but looks more like its just flowing/moving slowly.

What iv checked:

Amonia 0
Nitrite 0
PH is stable
Checked there gills, some fishes gills are moving faster then others. (not sure what im looking at really)

some videos:

Fish at the surface
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Fish at the bottom
<a href="https://www.youtube.com/watch?v=i6QrQANjzBs" target="_blank">http://www.youtube.com/watch?v=i6QrQANjzBs</a>&feature=youtu.be

So im thinking its that there isn't enough oxygen in the water but i have no idea what to buy. Do i need an airstone a wavemaker or just a pump at the surface? Also if it is just oxygen can my fish cope with it for at least another week? I get paid next week and don't have much money right now.

Any advice would be appreciated greatly

Alex.

Yes in the video thats the 50% moving slowly, iv tried moving the spraybar to multiple angles, its not very powerful. I wonder if the filter is under performing. The angels are also fighting a little they chase each other for a split second then stop. Wondering if this is normal behaviour.

Ill give it a few days and see if there is any change.

Thanks.

I think im going to go with the power head from what i have looked into its less noisy with better surface agitation Not sure what L/H i should be getting, iv read that angels don't like much water movement. If the power head is pointed just to the surface will it affect the water movement of the whole tank or just the surface alone?