We need to clean a small fish tank that holds male and female betta know how tell if there might be eggs in the Is it all right change water?

To tell if there might be eggs in a fish tank holding male and female betta fish, look for the following signs:

1. Bubble Nest: Male bettas build bubble nests at the water's surface to place their eggs. If you see a bubble nest, it's a good indication that there may be eggs.

2. Courting Behavior: If the male and female bettas are chasing each other or engaging in courtship behavior, this could also indicate that they are preparing to spawn.

3. Guard Duty: The male betta will often guard the bubble nest and the eggs, aggressively chasing away any other fish that come close.

4. Physical Appearance of the Female: A female betta who is carrying eggs may have a swollen belly.

Now, regarding changing the water, it's generally not recommended to make sudden changes to the water conditions when there are eggs or fry present. Betta eggs and fry are sensitive to water quality and temperature fluctuations. If you need to change the water, do so slowly and partially, replacing only a small portion of the water (around 10-15%) with conditioned water that matches the temperature of the tank. Always use a water conditioner to remove harmful substances from tap water.

Monitor the water quality closely during this time, ensuring the temperature remains stable, and consider using a sponge filter or filter media that won't suck up the eggs or fry. If you're concerned about the water quality, you may want to avoid changing the water altogether and instead focus on maintaining good water conditions through regular small water changes (10-15% every few days) and proper filtration.