Published at Friday, March 02nd, 2018 - 05:07:45 AM. Aquarium Equipment. By Judith Andrianto.
CO2: Carbon Dioxide is used when you want to grow demanding aquatic plants. If you use 3-5 watts of lighting or more to grow plants, you will most likely need to inject CO2 into your aquarium to feed your plants so they can outcompete unwanted algae. All that extra light is telling the plants to photosynthesize faster, but without CO2 they cannot, however unwanted algae can. A pressurized CO2 cylinder forces a controlled amount of CO2 through an airline into either a CO2 reactor which is plumbed inline of a canister filter, or through a ceramic CO2 diffuser which suction cups to the side glass of your aquarium.
Choosing your substrate: Substrate can help add to the overall biological filtration and take some of the load off your filter. When choosing your substrate, it is really up to you what you want. You could choose sand, rocks, gravel, river stones or even no substrate at all. The only time it really matters is when you have bottom dwelling fish that require a specific type of substrate. For instance if you want catfish you need a smooth substrate like small round pebbles so it doesnt irritate their skin as they rub across it. If you are growing high maintenance plants you may want to consider an aquatic soil or clay. This can cloud up the water for a few weeks but will eventually go away and your plants will love it. Regardless of the type of substrate, it is recommended you use 1-2 pounds, or roughly 2 inches of substrate to cover the bottom of your aquarium.
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