Please choose the correct solution to the question: How to make a automatic aquarium cleaner?

Solution1: Clean the tank, you should add in premixed gravel. Place in the pump and filters. Pump in water slowly then add snails and other micro critters. Plant your plants. Put the fish in last.

Solution2: Clean the tank, you should add in premixed gravel. Place in the pump and filters. Plant your plants. Pump in water slowly then add snails and other micro critters. Put the fish in last.

Answer format: solution1/solution2
Answer: solution2