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 water explained

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PostSubject: water explained   Tue Feb 03, 2009 9:41 am

here is an articule on water,

Using Pure Water in the Aquarium

Pure water can have specific uses in the aquarium, including:

* Topping up water lost to evaporation. This should ensure a constant hardness level in the aquarium, as only pure water evaporates, leaving behind salts, etc. This means that constantly topping up with tapwater will gradually increase the hardness/mineral content of the water because pure water is being replaced with water containing a range of minerals.

* Lowering hardness (and usually pH at the same time) by mixing a percantage with your normal tapwater.

* Providing a much purer source of water for your fish, which can have enormous benefits.

Note that pure sources of water must never be used alone in the aquarium. They are too pure, and contain none of the essential minerals that fish need, and also have no buffering capacity to stabilise the pH. It can either be mixed with a certain percentage of tapwater (it is possible to produce various hardness levels in this manner), or the commercially available salt mixes can be used to replenish a balanced mix of electrolytes - note that these are not the same as normal 'aquarium salt'. The following paragraphs outline some of the sources of 'pure' water.

Distilled water is produced by causing water to boil and turn to steam, which is then cooled (condensed) back into liquid water and collected. This is normally carried out in laboratories and industry, and is not really suitable for the home aquarist to perform. Distilled water is often available bottled however. It may be practical to use it if the required amount is small.

Reverse osmosis (RO) is a process which purifies water by forcing it through a fine membrane, which leaves impurities behind. This is probably the most practical option for the hobbyist, especially if larger amounts are required, i.e. for multiple tanks.

Deionised water (DI) is produced using special materials which attract ions from the water and bind them to their surfaces. Note that this is not the same as ion-exchange, where one ion is swapped for another, as in domestic water softeners. DI units can produce very pure water, but they are generally expensive to use. The cartridges require frequent replacement, and the amount of pure water produced per cartridge will decrease for tapwater which contains more minerals and contaminents. DI can be useful when included as the final stage on a reverse osmosis unit, where the combination can produce very high purity water.

Rainwater is in theory pure, because it is water which has evaporated and then condensed, similar to distillation, but on a planetary scale! However, a lot of rainwater is likely to be contaminated from the pollution in our atmosphere. If you live in a largely unpolluted part of the world, and decide to use rainwater, there are a few things which should help to ensure it is as pure as possible:

* Do not collect water after a long dry spell, there is likely to be a higher-than-normal amount of contaminents from the atmosphere. Collect after an initial rainfall has 'cleaned' the air to some extent.
* Collect the water from a clean roof or other source, and store in clean well-aerated containers.
* Filter the rainwater through carbon as an extra precaution - carbon will remove a wide range of toxins and impurities.

Apart from the concerns regarding purity, remember that rainwater may be a rather inconsistent source of water at times, so for many people, rainwater is not likely to be a practical source of purer water.

Note that spring water, mineral water and other bottled waters can vary widely in their composition, depending on the source, and they are not a pure source of water. They can vary from soft and acidic to hard and alkaline, and in some cases may be no more suitable for your fish than your tapwater or other source! It is also likely to prove expensive for larger amounts. Check the analysis on the bottle if you decide to use bottled water, and/or check the basics with your own test kits.

A few additional points to remember:

* Pure water can leach substances from the containers in which it is stored. It should therefore be stored in clean non-metallic containers, such as glass tanks or high-grade plastic which will not leach colour.

* Freshly purified water should be aerated for at least an hour, or left standing overnight, before use - as the oxygen content will be very low or essentially zero initially.

* Test kits for pH and hardness are essential if you use modified pure water for your aquarium.
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PostSubject: Re: water explained   Fri Feb 06, 2009 9:00 am

yet another great read L-Number well done cheers

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PostSubject: Re: water explained   Sat Feb 07, 2009 5:48 pm

Very good read cheers
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PostSubject: Re: water explained   Sat Feb 07, 2009 6:17 pm

good posting mate

ro water is used to clean windows on office blocks as it strips bird crap of the windows and if used pure on tanks will strip the skin from your plecs Evil or Very Mad



Dane
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PostSubject: Re: water explained   Sat Feb 07, 2009 6:27 pm

Dane wrote:
good posting mate

ro water is used to clean windows on office blocks as it strips bird crap of the windows and if used pure on tanks will strip the skin from your plecs Evil or Very Mad



Dane

Hmm RO can be lethal if not used correctly then?? scratch

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PostSubject: Re: water explained   Sat Feb 07, 2009 8:53 pm

yeah you mix it with tap water to get your desired tds reading



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PostSubject: Re: water explained   Sun Feb 08, 2009 10:44 am

Curby wrote:
Dane wrote:
good posting mate

ro water is used to clean windows on office blocks as it strips bird crap of the windows and if used pure on tanks will strip the skin from your plecs Evil or Very Mad



Dane

Hmm RO can be lethal if not used correctly then?? scratch

that is why HMA is better you can just add it straight to the tank i believe.... and there is no waste from an HMA
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PostSubject: Re: water explained   Fri Jan 22, 2010 3:09 pm

Hi All

I keep and breed Discus and have experience of RO and HMA water.

RO is not lethal to fish, however it has had almost all of the good things that fish need taken out by the Reverse Osmosis process.

It needs the right minerals adding back into it to make it stable and suitable for fish.

Because RO has had almost everything removed from it, the hardness, TDS and ph are low and the water is unstable as it has little buffering capability.

HMA filters use some of the same filter elements as an RO unit but don't have the final stage RO membrane.
HMA removes chlorine, sediment and heavy metals. Hence the name Heavy Metal Axe (HMA).

RO water can be made suitable by either adding re-mineralisation salts or HMA water in differing quantities.

By varying the mix of the two types of water you can engineer your water conditions, i.e. TDS, ph and hardness.

Hope this helps

Regards Steve
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PostSubject: Re: water explained   Fri Jan 22, 2010 5:29 pm

Good Job cheers steve............

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PostSubject: Re: water explained   Fri Jan 22, 2010 8:13 pm

Hi All

No probs

Give me a shout if anyone needs help or advice.

Regards Steve
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PostSubject: Re: water explained   Sat Jan 23, 2010 10:46 am

I think another member on here Jagz i think iam sure he also breeds discus.........
Get some pics up mate in the fresh photo section........ Very Happy

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PostSubject: Re: water explained   Sun Jan 24, 2010 9:29 am

Hi Curby

Jagtazman does keep and breed Discus.

We know each other through a Discus forum.

Will try to upload some pics

Steve
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PostSubject: Re: water explained   Sun Jan 24, 2010 10:29 am

Good to have a few connections then.... cheers

........................................ Nice one ........................................................

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PostSubject: Re: water explained   Sun Jan 24, 2010 4:34 pm

Hi

Yes. We Discus keepers like to know what is going on and share idea's and experiences.

Regards Steve
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PostSubject: Re: water explained   Sun Jan 24, 2010 5:32 pm

durhamdiscus wrote:
Hi Curby

Jagtazman does keep and breed Discus.

We know each other through a Discus forum.

Will try to upload some pics

Steve

How do Steve, fancy seeing you over here Laughing

As some of you know I switched form treated tap water to 100% HMA last year and it's the best thing I ever did.
My water quality is much improved and all my fish are imho much happy, used to have a few problems with my discus and I have next to non now
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PostSubject: Re: water explained   Sun Jan 24, 2010 6:25 pm

Hi Adam

I came on here looking for info regarding Super Red Bristlenose as I have recently aquired 3 and know very little about them.

I also use HMA as my water is really soft and has a TDS of about 90 from the tap so RO not needed.

My fish grow and breed in it no probs.

I have a couple of pairs with fry at the moment.

Regards Steve
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PostSubject: Re: water explained   Sun Jan 24, 2010 7:24 pm

durhamdiscus wrote:
Hi Adam

I came on here looking for info regarding Super Red Bristlenose as I have recently aquired 3 and know very little about them.


Regards Steve

Cool where did you get them from?
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PostSubject: Re: water explained   Mon Jan 25, 2010 10:00 am

Hi Adam

I bought them locally from someone advertising them on Aq Classified.

Steve
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PostSubject: Re: water explained   Mon Jan 25, 2010 1:44 pm

good luck with them mate
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PostSubject: Re: water explained   Mon Jan 25, 2010 2:27 pm

Hi Deano

Have you any spare Reds ?

Steve
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