Could you get a picture up on here of your fish? cant see on pic's
Also what do the marks look like? scale size red blotch
Do they seem sunken or more like a lump? neither
Are they just on the belly of your fish? yes
What size is your tank? 30x18x12
How often do you perform water changes? weekly 25%
Ammonia 0, nitrite 0, nitrate 30ppm, ph 7.5 alk 180, th 120
tank mates are WCMM 5, Danios 4, wight and red Oranda 1, Black moor 1, Hoplo catfish 2, Hillsteam loach 5
Kuhli Loach 2, Amano shrimp 5
fillters are Fluval 4 Plus with spray bar & a elite stingray 10
in the tank i have live plants, sand, slate and bog wood