My sister was telling me that green tea could work similar to oak leaves, so I raided our pantry to see what teas we had and we did have green tea.
The only problem:
One is sweetened. Ingredients are powdered green tea and 100% cane sugar.
One is honey lemon flavored. Ingredients are decaf green tea, chamomile flowers, lemongrass, licorice root, roasted chicory root, and soy lecithin.
One is blueberry flavored. Ingredients are green tea, blueberry flavor and concentrated juice, and dried blueberry pieces.
I have a feeling the last one is completely unusable, but would the other ones be an option? I can go to and find just straight green tea, but if I could use one of these safely, it would be a lot easier. I do not have oak leaves available at all.
The fish in question is in a quarter gallon hospital tank with water temperatures in the low to mid 80s (I bought a heater which may not be working to keep the tank warm since it got down to 74 without a heater). The tank gets 100% water changes at least once a day. Tank is also dosed with aquarium salt to fight off fin rot and swollen gills as well as ammonia burns. He only eats 1 pellet a day, but is offered about 3 a day as well as 1 bloodworm, but he shows no more interest in food once he's eaten one pellet.