my 2 oscars are only staying in the conner of the tank by the filter instead of swimming throught the tank. they act very skidish and skared. there is almost nothing in the tank besides water and the filter and heater. i dont have a light should i get one? or plants?

its a 25 gal tank.

firstly if you can give a reading on your water quality it would be a help. now how big are your o's. how long have you had them .these are a few question that might help in diagnosing what may be wrong with your fish

they are about 4-6 inches long. i have had them for about a monthand half to two months
water is clean for the most part

can you give actual readings for your water ammonia nitrite and nitrate.

clear water does not always mean good water.