King British Weekend Feeders for Fish

The small starfish-shaped blocks you are referring to are likely mineral or calcium blocks designed for aquariums or fish tanks. These blocks are made from a calcium-rich matrix that slowly dissolves over time, releasing essential minerals and nutrients into the water.

These blocks serve multiple purposes:

1. Mineral Supplement: The blocks provide a source of calcium and other essential minerals that are beneficial for fish and other aquatic creatures. Calcium is crucial for the development of strong bones and scales in fish.

2. Water Conditioning: As the blocks dissolve, they release minerals into the water, helping to stabilize and condition the water chemistry. This can be particularly beneficial in freshwater aquariums with soft water that may lack essential minerals.

3. pH Regulation: The dissolution of the calcium matrix can also help to maintain a stable pH level in the water, preventing drastic fluctuations that can stress fish.

4. Enhancing Growth: Calcium blocks can contribute to the overall well-being of aquatic organisms and promote healthy growth in fish, especially for species that require higher calcium levels, such as some African cichlids or crustaceans.

5. Aesthetic Appeal: The starfish-shaped blocks can also add a decorative element to the aquarium, enhancing its visual appeal.

When using these mineral blocks, it's essential to follow the manufacturer's instructions and dosage guidelines to prevent over-supplementation and maintain water quality. Additionally, some fish species may have specific dietary requirements, so it's a good idea to research the needs of the fish in your aquarium and ensure that the mineral blocks complement their diet appropriately.