Can aggressive fish ever be community tank candidates?

Fish are either aggressive or semi-aggressive and tend to avoid company. Cichlids are those in the first category. The second category includes fish like dwarf gouramis, which require a large tank and meticulous planning before being introduced. Territorial markers, such as rocks and plants, can help reduce conflicts, as well as monitor the behavior of the fish to prevent them from constantly attacking each other.

Tank design discourages aggression. I use lava rock formations to create distinct territories. Tall plants block the line of sight. Non-competitive catfish hold bottom areas. Gourami establish territories on the surface.

Selecting the Right Species requires careful matching. Semi-aggressive fish are best kept with other equally bold tank mates. Conversely, it is best not to combine slow-swimming, yet grumpy, angelfish with nipping fish. Likewise, bottom dwellers should not occupy the same column as other fish. Ensure your new fish are a different color from your existing ones to reduce the likelihood of attacks from being mistaken for their rivals.

Monitor for aggression. Look for fin nipping during feeding. Check for hiding fish daily. Monitor stress levels by changes in appetite. Have a quarantine tank ready. I intervene as soon as I notice any torn fins or scales.

Feeding strategies lessen competition. You can use feeding rings for surface feeders. Drop sinking pellets for bottom dwellers. It is better to feed territorial fish all at once. Distract aggressive species with live food. This will help reduce aggression related to food amongst fish in a mixed habitat.

Read the full article: Fish Compatibility Chart Ultimate Guide