I personally wouldn't keep any pictus catfish in a 10g tank...........definitely needs to be bigger. I also wouldn't keep less than 4 together. I keep 4 pim pictus. What pictus catfish have you got?
I have 5 pictus in my 65 gal and let me tell you they are fast movers...they need alot of swiming room...a 10 gal wont cut it..usually with 2 1 will become dominant and make the other 1 miserable...id get a larger tank or somin else that will work in your 10