my corys are bleeding at the base of the fin

[petitericeball]

its not really putting out blood but ya kno when you get cut it doesnt come out but you can see blood... thats what i see on my corys... i dont know if all of them have it but still... theres not much in the tank thatll attack the corys... even if they were it wouldnt be in that spot

ya kno behind the fin like conferably to a human armpit in that area... i dont know if its sick something attacking it if it got infected...

ammonias 0
nitrites 0
nitrates 5

tankmates..
1 beta
2 guppies
4 danios
6 guppy fry
2 otos

substrate
gravel (med sized)

amount of time
2-3 months

filter penguin 125

tank size 10 gallons (us)

 

[rollntider]

are ther any sharp rocks?

 

[petitericeball]

maybe should i take out all the rocks?? or something?

if i take out the rocks then the bacteria will die ;'( im scared

 

[bulldog188]

if you're worried about the rock put them in some tank water and retain their bacteria etc.

 

[petitericeball]

i got new rocks today they are a dark brown and pretty small... for my other rocks would putting them in like a rock tumbler work??