Is there a such thing as too much oxygen?
Since I have DIY CO2 that stays on overnight, I decided to hook up a supplementary air pump & bubble stone to make sure the fish have enough oxygen during the night. Even though I bought a very small air pump (5g), it makes an awful lot of bubbles! Way more than I imagined! So, is there a such thing as too much oxygen? I'm not going to poison my fish/plants with oxygen, am I?
55g: Finnex Planted+ and MonsterRay, Pressurized CO2 w/ Atomic inline diffuser, Eheim 2217, Eco-Complete, EI ferts. Lemon, Glowlight, and Black Neon Tetras; Harlequin Rasboras; Otos. Staurogyne repens, Hygrophila corymbosa, Ludwigia repens, Ludwigia glandulosa, Red Melon Sword, Wisteria, Water Sprite.