Stone AquariumChris's AquariumWalkway AquariumAquarium ThingsFreshwater IdeasFreshwater AquariumsFreshwater Aquarium Ideas AquascapingAquascape Aquarium IdeasBetta Fish Tank Ideas AquascapingForwardI love "walkways" in fish tanks and I know we're doing sand so I'm going to buy some beautiful, flat, smooth stones for a walkway but a bridge over it would be insanely beautifulThe material that sits in the bottom of an aquarium is called substrate. There are several different choices for aquarium substrate, the most common of which are sand and gravel. While sand and gravel might seem quite similar, each one has its benefits and drawbacks. Deciding which one to use depends on the types of fish you are going to keep in your tank as well as some other considerations. Our guide will help you decide which is best for your aquarium.The Case for Gravel SubstrateGravel substrate is the better choice for most freshwater aquariums. One of the major benefits of gravel is that it allows water to flow through it, preventing the buildup of amoebas and bacteria in the substrate.

If allowed to build up for too long, these can sicken your fish and lead to an accumulation of aquarium mold. In addition, gravel is heavy enough that it doesn’t get pulled into the aquarium filters where it may clog them or cause them to work less efficiently. Gravel also comes in a variety of colors so you can customize your tank and make it complement your fish.The Case for Sand SubstrateSand substrate doesn’t allow water to flow through it as well as gravel does. However, if your tank includes fish that like to burrow and scavenge in the sand, they will do the job of filtering the substrate. Sand has a couple of other benefits when compared to gravel. Many aquarium owners think it looks more natural, better mimicking the lakes or riverbeds that make up fish’ natural habitats. In addition, closely packed sand substrate needs to be changed less frequently. Because there are smaller gaps between the sand particles than between gravel particles, old food and plant matter tend to stay on top of the substrate rather than sinking to the bottom where they can rot and decay.

Plant and Animal ConsiderationsSome plants and animals you may keep in your aquarium have strong preferences for either sand or gravel substrate. For example, many species of cichlids need sand substrate in order to thrive since eating particles of sand help them digest food. Goldfish, on the other hand, risk suffering from an intestinal blockage if they accidentally ingest sand and so should always be housed in gravel substrate. fish tank film entierAquarium plants also have preferences for sand or gravel, so make sure to research the needs of the plants and animals in your tank before committing to sand or gravel.boyu fish tank bangalorePlacing and Changing SubstrateWhen placing substrate in your aquarium, make sure to use the right amount. where to buy cheap aquarium supplies

Small to medium aquariums should have two to three inches of gravel or one inch of sand in the bottom. Larger aquariums should have three to four inches of gravel or two inches of sand. Substrate does not need to be changed on a regular schedule, but should be swapped out when it becomes slimy or muddy.A number of factors go into deciding which type of substrate to use in your tank. nano fish tank marineChoosing the right substrate is essential to the health of the plants and animals in your aquarium. fish tank fish careOne of the first purchases most aquarists will make for a new aquarium, be it freshwater, saltwater, reef, discus, goldfish, cichlid or any other – is the gravel and substrate. tall fish tank plantsIt could be sand, crushed coral, Fluorite, neon pink pebbles, glass marbles or countless other materials  but it all tends to be the very first thing to go into an empty aquariums.

Do you really need it? Much like the eternal home decorating debate of hardwood-versus-carpets, the battle brews among aquarists over what covers the bottom of their aquariums, a layer of substrate or nothing at all. So why has substrate become such an integral part of the aquarium culture, and why are some aquarists now looking past it in favor of the bare glass or acrylic bottom of their aquariums? Much of it has to do with our understanding of the aquarium ecosystem now over what we knew years or even decades ago. Even as recently as five or ten years ago, undergravel filters were thought as indispensable for all types of aquariums and as such, gravel was thought vital to their function. We’ve come a long way with filtration technology since then, and we’ve also come a long way with understanding how the water chemistry in our aquariums functions. Alternatives and advancements have made the old undergravel systems nearly obsolete and the aquarium gravel that went on top of them is become more of an Option instead of a Requirement.

That said, how do you make the choice? Like so many other parts of our hobby, it comes down to personal preference and your goals. Bare-bottom tanks are becoming more common and have their benefits of substrated tank and vice versa; substrate is still a better choice than going bare for some other types of tanks. Weigh your options carefully before you choose which one is right for you. We’ll go over a head-to-head comparison in the major factors to consider to help you make your decision. An aquarium that is easy to clean and easy to care for is the dream of most aquarists. Bare-bottom tanks win this category easily. Ever wrestle with starting the siphon on a gravel vacuum, then have it clog up repeatedly with gravel when you are cleaning? With a bare-bottom tank, a gravel vacuum isn’t needed; you can just use tubing to vacuum up any waste sitting on the bottom of the tank and water pumps or powerheads can be used to circulate the water underneath and behind the rockwork more efficiently.

It can be a lot easier to scrub algae off of the glass bottom and sides without having to worry about missing some at the gravel line or getting bits of sand stuck in your scrubber as well. For tanks like reef aquariums with lots of rockwork, debris and detritus can get stuck under the rocks or in the back where your vacuum cant reach as well, causing the nitrate levels and algae blooms to increase. While not as vital in, say, a freshwater community tank, nitrate and algae can spell Doom (and Headaches) in a reef tank. I have to give this one to Substrate. Surprisingly, flat panes of glass or acrylics just aren’t found at the bottom of most environments in the wild. Natural environments have sand, or mud, or pebbles or some other natural material. Besides just plain looking more natural, some animals also need this substrate to live normal lives. Some fish and snails bury themselves in it or find their food in it. Timid animals need it to hide or camoflauge themselves and in some specialized ecosystems, the substrate plays a vital role in the water chemistry.

Most live aquarium plants won’t survive without a substrate to root into. Having a substrate also provides many more options in changing the look of the aquarium, whether its a natural substrate or a decorative one. This one is an even draw; both having substrate or having a bare-bottom can negatively and positively affect the water chemistry in an aquarium. Some substrates like crushed coral can buffer the pH and hardness of the water. For a saltwater tank with a target pH around 8.0-8.4, this is a good things. For a tropical tank with a target pH around 6.0-7.0, maybe not so much. A Flouorite substrate for planted freshwater tanks can give the plants some much-needed minerals and nutrients through their roots that a bare-bottomed tank can’t give them. As much as this exchange helps, any waste that can get trapped in the substrate can hurt the tank. If waste becomes trapped, it will decompose and increase nitrate, phosphates, ammonia and other negative levels which can lead to fish illness and algae blooms.

As we mentioned before, this waste is much easier to get rid of in a bare-bottomed tank. Microinverts, hitckhikers and other “bonus” tankmates Unexpected new arrivals like bristleworms can be the ban of a saltwater aquarist’s existance, and tiny little nuisance snails or flatworms can harass a freshwater aquarists to tears. Most of these critters live or reproduce to some extent within the substrate and getting rid of the substrate to go bare-bottom will help get rid of them. Unfortunately, it will also get rid of the good critters like copepods and amphipods that can provide a natural food source to some of the pickiest fish and inverts. If you are making your choice to go bare-bottom to get rid of the nuisance critters, weigh the needs of the rest of your tank carefully to see if they can do without the good to get rid of the bad. Choosing whether to add substrate to your aquarium or stick with the bare tank ultimately rests on you. Most aquariums will survive either way but one choice may be more successful than others.