The opposite of acid is alkaline.
Some species of fish have difficulty breeding in non-acidic water even though they can live quite happily in alkaline water. Neon tetras and Cardinal tetras are the most commonly know examples.
Dear list members A friend seen a CO2 generator in a hydroponics shop that was supposed to work on electrolysis of Oxalic acid. The price was ridiculous. Could have been another con.
Acid Sulphate soils
Acid sulphate soils commonly occur in brackish water marsh lands, swamps and mangrove areas.
Acid
A variety of sour, water-soluble compounds derived by a special partial exchange of replaceable hydrogen; a substance in which an aqueous solution can form positively charged hydrogen ions (H+). Acid colors turn litmus paper red.
"Acid-Base Exchange Resins" are those which function by exchanging hydrogen ions (H+) for Ca++, Mg++, Na+, etc. (the cations - positively charged ions), and hydroxyl ions (OH-) for carbonates, bicarbonates, sulfates, etc.
Tannin acid: You have added bogwood to the tank - and the water has turned orange? Its because the wood has leeched its tannin acids into the aquarium - a good boiling and soaking in a bucket for a few weeks, will remove the problem hopefully.
Acid from fish wastes or decayed food. Acidic water can iritate gills and skin.
White water line. Plants die, fish have frayed fins. Alkaline water can destroy gill and fin tissues. Ammonia becomes more toxic.
Alkaline Water ...
Acid soils
White worms select soils with a pH of 6.2 to 6.8.
Increasing salinity - No effect.
Folic acid : Poor growth, lethargy, fin damage, dark coloration, anemia.
Inositol : Poor growth, dropsy, skin lesions.
Pantothenic acid : Gill and skin problems, loss of appetite, poor growth, lethargy.
Boric acid and borate have a variety of chemical and biological effects in normal seawater, though biological effects are rarely discussed in the marine aquarium hobby.
The HNO2 (nitrous acid) also gets dissolved in water, releasing the nitrite ion (NO2-).
Vitamin M (folic acid)
effect: blood formation, metabolism
symptoms of deficiency: dark skin pigmentation
source: ...
Alkalinity is the measure of the total acid binding capacity (all the anions which can bind with free H+) but is comprised mostly of carbonate hardness in freshwater systems.
Many of them need soft and acid water and all of them are delicate. Hatchets have the added disadvantage that they tend to launch themselves out of the aquarium to an untimely death.
Elephant Nose and Baby Whale ...
Fish of all sorts expect a pH measurement of acid and/or base water. The common pH level is typically 6.5 and no higher than 7.5. Water types include saltwater, alkalinity, hardness, soft water, and so on.
Cherry Laurel (including apple, peach, pear and apricot seeds,
Prunus varieties), all parts dangerous; hydrocyanic acid.
China Berry Tree, berries are poisonous.
Columbine (Aquilegia), all parts.
There are 4 things to consider in water changes: NitrAtes, pheromones, acid (All natural fish wastes) and fish stress.
NitrAtes and Pheromones both cause stress, and can be removed from water though water changes.
These waters are soft and pH levels are acid to neutral. Many of the rivers that enter the Amazon from the South are Clear Water.
White Water conditions are created by large amounts of suspended sediments in the water.
Normally when you think of a Betta, you think warm, acid water, right? Well, with most of the mouthbrooders, and Betta enisae in particular, the truth is just the opposite. Most of the mouthbrooding Bettas come from moderately flowing streams.
Water that is too acid or alkali can hurt or even kill a fish so it is important to get it right. Symptoms of acidosis (pH too low) include erratic behaviour such as darting and jumping, usually followed by death.
TREATMENT In a soft, acid water aquarium, improve the water quality and decrease bacteria-count with acidifying agents. Use a proprietary antibacterial agent which may also be applied topically.
They do best in slightly acid, or neutral water, with a pH ranging from six to eight. They also prefer elongated tanks.
A: Usually, if a good grade porous/acid washed carbon is used to run over/through after protein skimming, this will do the trick.
How about Nalidixic Acid, or Protozin?
A: There is no known cure for Neon Tetra disease. Erythromycin is primarily effective against gram-positive bacteria, and no evidence exists that it has any effect on Neon Tetra disease.
Neutral to slightly acid water with a temperature between 78 - 82 degrees F. is preferred. For food, you will have to feed them live fish (no more than 1/3 the size of the Cachorro) for they will not except anything else.
Again, if you are lowering the pH in the tank, you add an acid which needs to neutralize the bases that are in the water as above. However, even after the bases are neutralized, the water will maintain a high pH because of the buffers in the water.
Running water Cyprinids can be kept in a tank with clear water which is well-filtered, slightly acid, and soft, at a temperature of 25-26°C.
Most Tetras are at their best in soft, slightly-acid water. Pacus are the largest of all the Characin species. They should not be purchased unless you have a very very large aquarium.
Most rivers in the Amazonian lowlands flow with water that is very soft and acid but the Rio San Alejandro is different.
Thus, as you try to lower the pH of hard, basic water of high alkalinity with additions of acid products, you are actually increasing the TDS, making the water even less like natural soft, acid habitats.
So what about those aquarists without acid water?
There are plenty of hardy Tetras out there for beginners without special water.
The one bit of aquarium chemistry that almost everyone has some familiarity with is pH, which basically is the measurement of how acid or base a given solution is. As most will recall, a pH value of 7.
Some bakers yeasts come with added ingredients like Calcium Sulphate and Ascorbic acid (vitamin C) to aid fast activation of the yeast.
This fish, like most tetras, needs soft, acid water, pH 6.5-6.8, with plenty of plants.
An easy fish to keep, the diamond tetra requires water on the acid side of neutral, with only moderate hardness. However, it will adjust to a slightly higher pH and hardness, although it may not look its best in those conditions.
Breeding/Reproduction: The Kribensis, Purple Cichlid, or Pink Kribensis Cichlid are egg layers and prefer to spawn in slightly acid water.
- if the pH is too high we can add a more acid water, limit water`s agitation, or filter the water with the help of the peat which will eliminate some acids.
EDTA (Ethylene-Diamene-Tetra-Acetic-acid) is the first and most commonly known. This is not ideally suited for aquatic plants because it is unstable at a higher pH than 6.0 and generally aquarium conditions are between pH6.0 and pH8.0.
In Northeastern Pennsylvania, the primary sources of sulfate in surface waters and groundwater include: acid mine drainage, acid deposition, and mineral oxidation. Standard set because of taste and aesthetic problems and sulfates laxative effects.
A decent (although somewhat dangerous) method of testing whether or not a rock will dissolve into your aquarium is to put a few drops of acid onto it (strong vinegar or muriatic acid; be careful!) and see if it foams or fizzes after a few minutes.
What I would suggest is that if you intend to get so called acid-loving fish like discus or tetras don't rush or panic to bring down the pH, or in the case of Malawians don't rush to lift the pH to around 9.
Maintained in soft, acid water in a well-planted aquarium with a very dark substrate and very dim light, the fish becomes at ease and the colourings intensify dramatically; ...
If bulbs or lenses accumulate mineral deposits, clean with a mild acid. In situations requiring higher light intensities, it is recommended to line fluorescent fixtures with a reflector. Replace fluorescent tubes annually, for maximum efficiency.
Buffering capacity is the ability of your water to neutralize added acid without significantly changing the pH. If your kH is too low (less than 4.5 odH), you may start to have problems with large pH swings.
The rivers they come in are usually on the neutral side and sometimes border on being soft/acid.
They are bubble-nest builders, like water that is acid( a ph of 6.8), and do best in a well planted tank. Water should be clear, but with plenty of sediment.
Instead of using the borate compound (sodium tetra borate hexahydrate) you may wish to use boric acid. The latter is more difficult to use though.
Alkalinity is a measure of the ability of a solution to neutralize acid without changing the pH. It both controls and maintains water pH.
If this doesn't induce spawning, continue 50% colder waterchanges every other day. Lowering the waterlevel for a period of time may also help. Using a watersoftener, and changing the pH towards neutral or a little acid may also help.
Pyrites:
Known as 'fools gold', any rocks with visible bronze or gold metallic crystals should be avoided, they are usually most obvious near mineral veins. Pyrite minerals are Sulphides which in water undergo reactions which result in an acid pH.
Amazon Sword Plants (Echinodorus) are in a genus that embraces more than fifty relatively hardy and adaptable species, most of which are native to the flood plains of South America. They prefer water that is neutral or slightly acid and not too hard ...
Some fish are shy and require a lot of cover, caves, or dim light. There are also fish that require a particular water chemistry to breed. Examples are discus, which require very soft, acid water or African cichlids which require very hard, ...
In heavily planted tanks, carbon dioxide can be bubbled into the aquarium as a gas and will be absorbed into the water usually as carbolic acid, and becomes availble for the plants to use.
 See also: Water, Fish, Aquarium, Plants, Species
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