fine sand - Aquarium Advice - Aquarium Forum Community
(As long as it's fine enough I've never had any problems with seahorses "snicking" up sand in the aquarium
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).
Deeper layers especially with finer gravel sizes can pose a danger, given that food particles will sink into a less oxygenated area. This will over time produce hydrogen sulfite (rotten egg smell), which is highly toxic for the fish.Common Aquarium Gravel & Sand
Unfortunately, the aquarium sand I bought is extremely fine
Fine black gravel (sand) - Aquarium Advice - Aquarium Forum Community
Very much okay! A thin layer of live sand, preferably black, is the ideal substrate for a SHOWLR (Seahorse Only With Live Rock) tank, which is type of seahorse setup I prefer. It is bioactive, aesthetically pleasing, and is a fine-grained sand well suited for the various snails that form an essential part of the cleanup crew for a seahorse tank. I find the dark color shows off my seahorses and macroalgae to great effect and enhances the appearance of tank in general. (As long as it's fine enough I've never had any problems with seahorses "snicking" up sand in the aquarium. They will do so on occasion when feeding off the bottom, but never have any difficulty at all expelling it again as long as it's fine grained.)When I first started in the aquarium hobby a thousand years ago, the decision about what aquarium sand to use was pretty simple. There were really two decisions: fine sand or coarse (crushed coral), deep sand bed, shallow sand bed/. Those are still two of the more important parameters to consider, but the increased popularity of the hobby has created opportunity for more options for us consumers. I think most people would agree that it is generally better to have more options than less, but having too many options can sometimes create a separate problem: how to pick the right substrate for your saltwater aquarium?Perfect grain size Pool filter sand is coarser than play sand but still a lot finer than any aquarium gravel. Play sand is very fine, which unfortunately means it tends to clump together. Clumping can lead to anaerobic pockets in the substrate, which can produce chemicals that are harmful to fish and have a bad odor. With aquarium gravel the crevices between the particles are large enough to trap leftover food and other debris, which need to be removed by gravel vacuuming. Pool filter sand isn't so fine that it clumps, but fine enough that debris usually stays on top of it from where it gets swept into the filters or is easier to remove by vacuuming. is perhaps the most commonly recommended sand in the saltwater aquarium hobby. It is generally available as a fine grain product that “looks” like the prototypical sand. What makes aragonite sand so commonly used in the aquarium hobby is that it is made from the same stuff that coral skeletons are made of…calcium carbonate. In fact, the term aragonite sand is really just a fancy way to state…sand composed of calcium carbonate.