Caribsea Super Naturals Aquarium Sand Crystal River 20-Pound
1 Bag Fish Ornament Tank Aquarium River or Beach Sand Decorations Garden Supplies #Unbranded
On the other hand, river sand cannot be used withan undergravel filter; unlike coral sand the grains are so small andcompact so readily that it cannot be separated from a gravel filter bedwithout impeding the flow of water. River sand can only be used as adecorative medium for covering the bottom of the tank, and in anunplanted tank the depth should be no greater than that which the fishcan easily move around while they're digging. The danger comes fromfood or other pieces of organic matter getting buried in the sand andallowed to decay anaerobically. Anaerobic decay is bad because itproduces toxic gases that can leak into the aquarium stressing, andpotentially killing, the fish. It is usually recommended thatsubstrates that are not part of an undergravel filter should be nodeeper than around 1 to 2 cm. Planted tanks can get away with greaterdepths, because the roots themselves will oxygenate the substratepreventing the risk of anaerobic decay, and where you are keeping bigfish, such as violet gobies or flounders, that can and do shift largequantities of sand, you can increase the depth of sand used accordingto the size of the fish in question.
I like silica sand a great deal. Not only do thefish love it, but with the appropriate use of a supplement likelaterite or aquarium soil it can also make an outstanding medium foraquatic plants. But is it the perfect substrate? I think not; whileundoubtedly an versatile and inexpensive substrate it does have somemajor shortcomings. Just as with river sand, it cannot be used with anundergravel filter, and may also allow for potentially dangerousanaerobic decay. Silica sand is also very reflective, and as notedearlier, some fish fade their colours when kept over such assubstrate.
Is River Sand A Good Substrate For A Planted Aquarium
Collecting river sand/gravel for substrate. - Aquarium Forum
With some finer materials, you might discover that when you place a new plant into the substrate, it tends to come back out easily. Once the roots grow, however, the aquatic plant will stay in place. So, you have to take a little extra care when planting in finer-grained material, being careful not to disturb the aquatic plant right after planting. A fine-grain material that I like is onyx sand because of its slate black color. I have also used plain river sand with good results; this can be bought from an aquarium store or collected from a river (either will work if it’s inert in water and well-rinsed).There's no need to impose the box-like shapeof the aquarium on your design. Unless you're modelling the smooth,flat bottom of a lake or river, then a substrate that is shalloweralong one face of the tank and deeper at the other will be much morerealistic. Plants prefer certain depths too, and the aquarist shouldconsider this when planting the tank. is adeep-water plant that prefers the main river channels where there is norisk of being exposed to the air. Amazon swords and, on the other hand, are shallow-water plants thatmay spend part of the year above the water line as bog plants. Slopingthe sand or gravel has another benefit: solid wastes slide down to thelowest point, where they can be easily netted or siphoned out.Sandy bottoms occur in the ocean as well as in brackish environments and in freshwater lakes, rivers, streams and ponds and sand is therefore used in all sorts of aquariums.Ordinary, properly cleaned river-sand is perfectly fine, although no-one is going to stop you if you opt for fancier, more expensive sands! While many aquarists like to use crushed coral to help harden the water and increase its pH, its coarseness traps a lot of debris, just like gravel and is less suited to the sand-feeding habits of this species. In fact, to influence pH at all, crushed coral should be placed in such a way that it is constantly in contact with a continuous water flow — logically making this material a rather silly choice as substrate. Coral sand, while more suitable than crushed coral, is expensive, especially when it comes to larger tanks – in which case a mix of ordinary and coral sand may be a more economic solution. As for influencing the pH, well, you read what I had to say about crushed coral.