In a small tank, the fish can only have a limited space to move around, which can hinder their growth and health. This can also cut short their life.
2
Not changing water frequently
Frequent water changes are a must. Even if your tank looks clean, small food particles and algae may still be present, which can impact the health of your fish.
3
Overfeeding the fish
Avoid overfeeding, as uneaten food can pollute the water and increase nitrate and ammonia levels that are toxic to the fish's health.
4
Keeping the light of your aquarium switched on
Your fish also need to rest; leaving the light switched on can cause them stress. Prolonged lighting can also lead to unwanted algae growth.
5
Overstocking
Regardless of its size, every aquarium has a limited capacity to accommodate fish as they may grow larger with time or turn aggressive when too crowded.