The fish on this page come from tropical areas where rivers flow into the ocean (estuaries or a term we call brackish water) When the tide goes out, these fish live in freshwater. When the tide comes back in, they live in river water mixed with ocean water (brackish water). These fish are flexible when it comes to the amount of salt and or freshwater they live in, as opposed to true Marine fish that need to live in actual Salt water. Many plants also grow in these estuaries. For a list of plants appropriate for these types of waters, please check out our Brackish Habitats here
Note: True marine/saltwater spg is 1.025
Water Temp: 80-84
Lighting: 0.5 watts per gallon and more needed up to 12 hours per day.
Substrate: Sand or Gravel
Water Changes: 1 time every 2 weeks
pH: Versatile 7.5 - 8.5
Total Hardness: 4° to 5° DH
Co2 (Carbon Dioxide in Solution): 10 mg per litre
Fish Types: Archerfish, Indian Glassfish, Perches, Shark Cats, Toadfish, Needlenose Gars, Cichlids: i.e. Chromides, Spadefish, Mollies, Guppies, Gobies, Killifish, Rainbowfish, Loaches, Monos, Leaffish, Puffers, Scats, Pipefish, and Targetfish.
Decorate with taller plants in the background and shorter ones on the side. Add one or more rock cave for your gobies. Anubias and Java Fern should be attached to the rock cave(s).
Use Marine Salt only
DO NOT use aquarium salt. It’s not the same!
Use about 1-2 tablespoons of marine salt per gallon of water or a specific gravity of 1.005-1.010 will be adequate for the full lives of most Brackish water fish, especially Gobies.
Puffers prefer saltier conditions with around 3-5 tablespoons of marine salt per gallon of water or a specific gravity of 1.010-1.020.
Water Sprite, Anubias, Vallisneria, Hairgrass, Java Fern, etc are best suited for a Brackish Tank. Many freshwater plants do not like to be in specific gravity above 1.015. Sticking with the 1 to 2 tablespoons of Marine Salt will keep your tank healthy. Once you begin to raise the gravity level higher than 1.015 your plants may begin to die off, as they would in nature, and you would need to replace them with more Marine friendly plants like Caulerpa. There are about 86 species of plants in the Genus: Caulerpa.