Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to help guppy fry grow [title] Create a stress-free atmosphere. [step] This is very important because stress causes death in mature fish, not to mention small fry. You can help by introducing a few artificial plants or live plants for your fry tank.

Ending1: Having pebbles for fry to hide is a good idea as well. [substeps] Your fry should be separated from other fish or mature guppies. Ending2: If you wish, you can even add some live plants and some bean sprouts to the tank to attract fish. [substeps] Use commercial aquarium air conditioners, heating units and a humidifier in place of your natural air conditioner. Ending3: Keep the temperature comfortable, but not too warm! [title] Feed your fry the right amount of veggies. [step] When they are cooked the fry will get a lot bigger, and they will lay flat in their shells. Ending4: You can also offer one to two fish oil softeners each month. Choose biodegradable fish products that are herbal, java, or arrowroot essential oils.

Answer format: ending1/ending2/ending3/ending4