I have a new betta and wasn't advised to cycle the tank beforehand. i am doing regular every other day wc to keep levels down during the cycle. I have just got home from work and one of my bettas ventral fins is curling upward. His fins also look slightly droopy and he doesn't swim around that much and stays at the top in his floating log. I dont know if this is because he is still settling in. He hasn't eaten today either. I love my betta and want him to be ok, could I please have some advice on what to do. There is no ammonia in tank, just high levels of nitrite and nitrate. I have been keeping them down with wc. I also use de chlorinator and anti stress. I have a 5 gal tank.