For example, if we add sugar to artificial seawater, we will see that our salinity value will increase but we have not changed the concentration of salt in the water. No, that is … Plus, fish have blood, inverts, which include parasites, do not. Most stores (and the ones I worked at included) kept salinity in fish only tanks at 1.020 and there seems to be no long term effect. If you are using an refractometer, you should try and keep the salinity levels around 35 ppt. For a simple fish only, I'd shoot for 77-78 degrees. Kevin may be reached at kcosta@hannainst.com or 401-450-6051. Algae doesn't like it but neither do snails, fish breath easier etc. Additionally conductivity may also be used as a means to measure salinity, as the salts become ions when dissolved in water that can conduct an electrical current sensed by the meter and measured in mS. I've seen people with salinity down to 1.015 and keeping that long term and the fish still doing "fine" (fine is in quotations because I obviously do not have constant access to assess his tank). If we measured the salinity of that sample with our HI98319 conductivity meter you’ll notice the value is largely unchanged. The more salt in your water, the higher your readings will be. When starting out with a fish-only aquarium, it is a good idea to design your set up with the thought in mind that you may decide to convert the aquarium into a fish-only with live rock or a reef tank … on a fish only system with no live rock you want to keep the salinity low as this reduces the ammount of possible parasits, 1.019 is fine for a fish only system. Anyway, it all depends on what you're trying to keep. Hanna Instruments offers our. As a general guideline, it is best to maintain a salinity of 1.026 (or 35ppt or 53 mS/cm conductivity) and know where your aquarium fish come from to distinguish what their natural salinity level is. Or take the time to find “scientific proof” . The fifth most important saltwater aquarium water parameter is nitrite. Or maybe everyone does it and continues to because it doesn’t work. http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2761.1979.tb00146.x/full. In addition, as water evaporates in the aquarium, your salinity level will rise because the salt ions remain in the water. Saltwater tank salinity is only one major factor that can contribute to increased stress in newly caught saltwater fish - other factors include levels of dissolved oxygen, the space limitations of a glass aquarium… It makes sense that fish would adapt to the conditions in which they've lived forever and … So I would lean more towards 1.022 to give a little buffer in case salinity … If you plan to cultivate a fish-only saltwater tank it would be wise to invest in an aquarium water test kit so you can keep an eye on your ammonia, nitrite, nitrate and pH levels as a means of evaluating the water quality. Unfortunately, I don't have access to this article any longer but scientific studies have been done showing reduces parasitic reproduction at lower salinities. The claim is that lower salinity eases/slows osmoregulation. Definitely not my intention to argue for the sake of arguing, just stating my opinion based on my research, experience, and logic (this is my second stint in the hobby). All of the LFS around me run their fish only tanks at a lower salinity to keep parasites at bay. Any solid reasons out there? And it’s some big cover up to save a few pennies on salt. The predominant elements that exist are chloride, sodium, sulfate, magnesium, calcium and potassium. Temperature in saltwater fish tanks is the parameter that is most often attributed to aquarium failures and “tank crashes.” Fish and other marine creatures have a difficult time processing oxygen and functioning overall at temperatures that are not ideal – this will lead to sick animals or worse dead ones. Ya know, at this lower salinity ( fish only) levels will be in that range. I don't know if lower salinity is any "worse" for fish, but it isn't natural so I personally would stay away from it. Saltwater aquariums are usually maintained at a S.G. of 1.020-1.026, depending on the type of organisms maintained in the aquarium. More frequent water changes will help, but most synthetic marine salts only yield a KH of around 8. It’s tried and true proven. Therefore only … Hanna Instruments offers our Digital Refractometer for Seawater Analysis (HI96822) which is perfect for saltwater aquariums as it can measure in Practical Salinity Units, parts-per-thousand (ppt) or specific gravity. The problem I have is online vendors shipping fish at low salinities, creating more work for me to bring my QT's salinity up to my reef. That is why I gave you that range, because anything within that is fine. I found nothing but the contrary when searching for some scientific proof. The most well-known methods by marine aquarists include using hydrometers, refractometers and conductivity meters. Lab Grade Dissolved Oxygen Probe …7.54 7.33 7.14 6.94 6.75 6.57 6.39 6.22 As an example, a tank with a salinity of 35ppt and a temperature of 78.8 degrees Fahrenheit can have a maximum dissolved … That’s why fish are much better able to deal with lower salt. … The idea is to imitate the salinity found in the natural environment of the fish you keep. That’s why the industry and hobbyists alike widely use this practice. I think it is also common sense. What I found was that most fish optomize osmoregulation at the salinity from which they come. Saltwater aquarium salinity is usually kept between 1.020-1.028sg. It is common to have inflated values with a refractometer due to the large number of materials which will affect the density of that water outside of the dissolved salt values. This is done anytime saltwater is made, either when first setting up an aquarium or when performing water changes periodically. NSW is 1.026, so a lot argue that is what all tanks should be run at. Salinity is the measurement of all the dissolved salts in water. Optical refractometers are often calibrated to a specific temperature range and if your sample temperature does not fit in that range, your results can be skewed. When it comes to cultivating a fish-only tank there are two main types – community tanks and semi-aggressive tanks. Chloride generally exists in about 19,000 ppm and sodium commonly exists at 10,500 ppm, followed by sulfate (approximately 2,700 ppm), magnesium (roughly 1300 ppm), calcium (about 420 ppm) and potassium (approximately 400 ppm). The fish-only aquarium is a great setup for the dedicated beginner interested in marine aquariums. Chloride generally exists in about 19,000 ppm and sodium commonly exists at 10,500 ppm, followed by sulfate (approximately 2,700 ppm), magnesium (roughly 1300 ppm), calcium (about 420 ppm) and potassium (approximately 400 ppm). As a general guideline, it is best to maintain a salinity of 1.026 (or 35ppt or 53 mS/cm conductivity) and know where your aquarium fish come from to distinguish what their natural salinity level is. Equipment Upgrade Considerations . hbspt.cta._relativeUrls=true;hbspt.cta.load(2134380, '336ebb1a-3569-4213-8024-c2edf77b13c3', {}); In addition to  salinity digital refractometers, there are salinity testers. For example, anti-caking agent in salt mixes, organic waste, sugars, potential non-ionic contaminants or uneaten fish food can increase the values produced on a refractometer but this would be less likely to occur on a conductivity meter like the HI98319. The waterproof tester ensures that you are protected from your day to day testing, and unlike with refractometers, you get no light interference. Only freshwater will evaporate from the tank leaving the salt and minerals behind. True, the lower salinity you go, it is likely that more and more parasite strains are affected as it is it is below what they encounter in nature. Reef aquariums or any aquarium housing invertebrates … No the proof is in the pudding because I’v done it, countless times, and it works.

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