First off, tank. 5 Gallon Minibow5 (money and space constraints) with 1 fancy goldfish. I purchased him about 3 weeks ago and the lady at the pet store said that I could feed him an orange once a week. A lot of goldfish specific sites say that oranges are ok to give. I finally decided to try it and gave the goldfish a piece of orange about the size of the tip of my pinky finger. I noticed a lot of juice dissipating into the water when I dropped it in. How much will this affect the PH
level? I do 50% water changes every friday. There is still a tiny bit of orange that he hasn't ate, it has been about 10 mins, but I still see him nibble it everyonce in a while, should I fish this excess out or just leave it for him to chew on?
Is this good practice to give him some orange every week or so? Are there anything special I need to look out for feeding him "real" food? All of my fish have always had manufactured flakes or pellets.