Problem: How to clean a goldfish tank
Every week you will need to change about 25% (perhaps more depending on your water readings/types of fish you have) of the water in your tank.
How much and how often depends on the weekly test results and isn't covered in this article. This article is to give new keepers a guide on how to perform a water change in the most effective, least stressful manner. OPTIONS:
- Account for the cost of the water you use in your tank. This can vary by aquarium, community and industry.
- Performing this should be avoided because newer tanks usually need only do it once a week. Move the fish into a larger tank.
- Tank keepers can also use this guide if they are normally adept at building a firm tank. This can definitely be saved for when you are just starting out.
- Less stressful for both the fish and the keeper that is. Make sure you have some basic equipment.

Answer: Less stressful for both the fish and the keeper that is. Make sure you have some basic equipment.

Problem: Suddenly, the horseman and a calf run to the the arena, while the horseman runs behind the calf spinning in the air a rope. after OPTIONS:
- , the horseman throws the hoop and catch the calf, then quickly he lie the calf on the floor and tie the legs.
- , the horseman raises his horse and push the calf with a rope.
- , the horse and calf stand on the horse and groom the calf with ropes, the calf jumps off the horse and throw the ropes to the grooms, then a woman jumps off the horse and tie the calf with ropes.
- , a man in black horse ride to the arena and the calf and man ride to the horse bull.

Answer: , the horseman throws the hoop and catch the calf, then quickly he lie the calf on the floor and tie the legs.

Problem: How to do the basics of skateboarding
Get on your board while on carpet.
If you're not allowed to stand on your board in the house try in the grass. While holding onto something get used to how the board feels and everything. OPTIONS:
- Once familiar with the board, try standing on pavement without holding anything, put something nearby just in case you fall. Then, decide what your feet positioning is.
- If your board is out of kilter the first few times you are on it, get off of it and continue making new steps. If you are going to be skateboarding on rough surfaces you are obviously not allowed to ride on grass, walk around the glass-bottom or even go all the way around it.
- On carpet go to the wheels and if it looks okay or looks good get a friend to hold onto them. If your board makes you uncomfortable go to someone else.
- Push off the ground and get on your board. Once you're in the grass look left and right as you ride.
Answer: Once familiar with the board, try standing on pavement without holding anything, put something nearby just in case you fall. Then, decide what your feet positioning is.