2. Specific gravity of calcium. The calcium content in the water is very important for those hard corals. They will use a lot of calcium to build bones, and the calcium in the water will gradually decrease. It is dangerous when the calcium content drops to 350ppm. It is best to use 400ppm calcium chloride.
3. Proper lighting. Too weak light will reduce the growth of invertebrates and destroy the balance of the system. If you find that your living stone is very clean without any algae, it may not be a good situation. Coral needs proper lighting. It is a good practice to use halogen/fluorescent lamps and timers to illuminate for 8- 10 hours every day.
4. temperature. The temperature of fish tank water may be higher than room temperature, and electrical appliances (such as halogen lamps and submersible pumps) will continue to heat up. If your room temperature is 32℃ in summer, the fish tank water may already be 36℃. You can add a bottle of ice water to cool the fish tank water, but the effect will not last long and it is also dangerous to the fish (due to the sudden change of water temperature). Blowing a fan on the water helps to lower the water temperature (2℃-3℃). A more convenient method is to install a water cooler.
5. Beware of animals that eat corals. Don't misplace any fish that like coral, such as round fish and shells. Optional:
(1) Anemone fish: bride, red apple, tomato, clown, etc.
(2) Sparidae: green devils, blue devils, velvet, etc.
(3) Arova: Doctor, Red Dragon, Huanglong, etc.
(4) Little angelfish: flame fairy, fire back fairy, coral beauty, etc.
(5) Sparidae: purple crane, yellow crane, etc.