C-02-Q084mediumsingle_mcq
Below what level of carbon dioxide in pond water is non-poisonous for fish?
Below what level of carbon dioxide in pond water is non-poisonous for fish?
- a5 mg/litre
- b8 mg/litre
- c12 mg/litre
- d20 mg/litre
Below what level of carbon dioxide in pond water is non-poisonous for fish?