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Believe it or not


minchton

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On the weekend I looked at a marine tank. Nothing unusual about that!

But wait theres more.

The tank which was purchased two years ago is a standard three foot tank. They run a medium? queen type skimmer and a small powerhead.

Lighting is by a 150 Metal Halide, it was 2 lights but they felt this created too much heat so took one away.

The tank has not had a water change in the time they have had the tank (2 years), nor has the MH bulb been changed in this time. They started with 1 coral and 1 anenome. the coral has divided and there are now 4 nice sized pieces. The anenome has grown a number of arms and appears to have split at least twice.

There are three nice sized fish: a blue tang(4in), I think a brown tang(3in) and a clown which I could not identify (3in) The clown is maroon with yellow stripes. They all looked happy and healthy and live on a mainly flake diet

Water is topped up with fresh about every three weeks or when the level is getting a bit low for the anenome and the only additive is a few drop of "reef solution" once a month.

Now if this doesn't throw all the right procedures out the window with the water what does it tell you.

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even I cant quite believe it but the fish are healthy and very friendly.

Water test results because I brought some home to test

PH 8

Phosphate .03

salinity 1.025

Magnesium 1500

calcium 500

Kh 14.4

Ammonia 1

Nitrite .25

Nitrate (ouch) 160

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It is not my intention to start an argument over this tank. the information I am giving was just for a matter of interest

The owners stated that apart from food every thing with the tank was as given to them when they bought it. From memory the reef solution was about half full. they still had the original bag of salt that came with the tank

As I said at the start I cant explain it but I do wish all marine tanks were this easy to keep!!!!!!!!!!!!!!!!!

They didnt even have test kits and were quite surprised when I mentioned testing the water

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It is not my intention to start an argument over this tank. the information I am giving was just for a matter of interest

i think you fail to see the difference between an argument and an open discussion. anything posted here is open for discussion. no one is saying your readings are wrong, we are saying that it is hard to believe as kH, calcium and magnesium are generally depleted/drops over time, not increased. so the only logical explanation is that they are being added back by the reef solution.

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Just to throw my own oar into the mix. I am with the majority on this, those number's are hard to belive.

KH, CA & MG are all bound to each other, however I didn't think it was really possible to have such a high KH with such a low PH. Doesn't feel right.

Test kits have a limited life span, perhapps they need replacing.

Water changes. There was a tank on RC recently (mojoreef's) who's only water change was 30L a year (replacing skim-mate). However their is an update on the thread showing that he started doing 10% monthly water changes and noticed a major increase in growth and colour of corals and behavior of the fish, and made it clear that he would no longer advocate not doing water changes. Also note it was a big tank, over 500 gallons I think.

Water changes 2. Richard Durso (of standpipe fame) had an awesome tank, with corals sexually reproducing etc. He also was an advocate of no water changes, having grown some stunning corals in his tank. He broke his tank down last year when he moved home. He has sited several times that the reason he doesn't do water changes is one of cost, he is tight with money you see. He has said that he feels the tank woudl beifit from more water changes but its not nessessary. Again this is a larger than normal tank (over 400 gallons *i think*).

the water paramaters of the tank Mitch is talking about are appauling and if ever there was a reason to do a water change, 160 nitrate is it.

Pies

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If the animals are happy and used to those conditions you certainly would not want to do any large water changes. Many animals, previously oblivious to the fact that they have been living in sub optimal conditions, have only discovered this fact as they died from a sudden change (improvement) in those conditions.

Steve

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the test kits I am using are all less than one month old.

I have been down today and done a 50% water change and within minutes the corals changed from a dull grey colour to lovely green and mauve

Hope this sudden change is not now going to kill all the tank off. Did use water from my tank which I was doing a water change on so some of my parameters would not have been 1st class. This hopefully will be O.K.

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