Fish rubbing sides on rocks, no signs of ich, what can it be

[tmy420]

I have:
4 bronze corydora's
3 spotted corydora's
2 unknown cordora's
2 gold white mountain cloud minnows
4 giant danios
and 1 pleco

All of them but the placo flash on the rocks... The corydoras do it rarely, the danios only do it a little, and the gwc minnows do it a lot...

They dont have white spots what so ever on them... Someone told me it could be chlorine or ammonia?

Anyone have any thoughts? I put salt in my fish tank and raised the temps, also lowered the water A LOT so my 2 penguin filters would make a lot of air in there for the minnows since it would be so hot...

I think I have a decent ammount of bubbles at the top of the water that are just now starting to disapear, I dont know if its because the water is so low or what, but I heard bubbles could be ammonia... There wasnt ALOT of bubbles though.

 

[rich311k]

What are your test levels?

 

[tmy420]

Thats just it.. dont have test kits for that... I am gunna get them very soon but im stuck for a week without getting them (I get paid every 2 weeks)..

 

[Zagz]

I would do a water change just in case then. How long has your tank been set up for? It is most likely water conditions causing it.

 

[Zagz]

Also what size tank and what temp are you keeping it at?

 

[tmy420]

about 4 months, maybe 5... All the fish been doing just fine not one died or got sick for that amount of time. I had a red belly pacu in my tank (I didnt know they get so big, the guy told me they get as big as a silver dollar!) and he even used to scratch his sides, and this was in another tank before this one. I think its my tap water, maybe could be something im doing wrong, i dunno..

 

[Fishyfanatic]

Until you can get your test kit, go to the lfs with a sample of your water. It could be high levels of ammonia. If it is, water changes are needed. The temp and tank size is also needed.

 

[tmy420]

30 gallon long
usually kept at about 75 (now at 82 and the highest it will go without it being constantly on)
penguin 170 (50 gal filter bio wheel)
penguin mini

 

[tmy420]

Also I would like to add that 1 of my bronze corydoras is really fat... any ideas about that? It seems like he was fatter yesterday and may be getting better.