I had 6 glass catfishes however I lost 4 recently from ich which has been treated already. The remaining 2 got really stressed without the rest and stayed in a corner so I went out to buy 6 more. However I could only find glass catfishes that were fully grown over 2 inches while the other remaining 2 were still really small at about an inch. I thought they would be able to school together since they are the same variety of glass catfishes but the 2 are still in the corner and one of them is turning white (probably from the stress). Is there any way to get them to school together or are they too big to school with the small ones?