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Update on my frontosas


Conaquavict

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  • 5 weeks later...
and because of the weight also, shipping is expensive! :o

I'd say :P

Aragonite is technically unstable at normal surface temperatures and pressures. It is stable at higher pressures, but not at higher temperatures such that in order to keep aragonite stable with increasing temperature, the pressure must also increase. If aragonite is heated to 400 degrees C, it will spontaneously convert to calcite if the pressure is not also increased. Since calcite is the more stable mineral, why does aragonite even form? Well under certain conditions of formation, the crystallization of calcite is somehow discouraged and aragonite will form instead. The magnesium and salt content of the crystallizing fluid, the turbidity of the fluid and the time of crystallization are decidedly important factors, but there are perhaps others. Such areas as sabkhas and oolitic shoals tend to allow significant amounts of aragonite to form. Also metamorphism that includes high pressures and low temperatures (relatively) can form aragonite. After burial, given enough time, the aragonite will almost certainly alter to calcite. Sedimentologists are very interested in aragonite and calcite stability fields because the conversion of aragonite to calcite after deposition has a distinct effect on the character of the sedimentary rocks.

Confusing this chemistry buzz

http://mineral.galleries.com/minerals/c ... agonit.htm

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I am probably heading thru ChCh next month then will be in Auckland Easter weekend. If someone is wanting this calcite stuff, I am happy to get it and bring it up with me if you're willing to wait. Save freight. I have a Honda Odyssey and will have 5 adults in it (3 of them not lightweights - but don't tell them I said that) so don't ask me to bring too much! Not sure how much of a load I can put on the axles :lol:

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your calcite look pretty similar to arangonite to me. aragonite keeps pH at around 8.2 and kH anywhere over 10 which is good because africans like hard water. mystic, do you have an 8 foot tank?? i have aragonite in most of my filters, the water goes through it after the carbon and that helps the pH stay high. i have nothing apart form that in my filters for my 800litre tank and it seems to stay about right so i'm happy. i might have to put some in the new sump i am making.

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Hi guys i have the fronts in a 75g at the moment,

they will be moving to a bigger tank of course when they get bigger,

The subtrrate is a mixture of coral sand and coral gravel

and the ph stays at 7.9-8.0, they seem to be thriving at this.

Does anyone know why fronts are so slow growing cmpared to other

cichlids and why one fishs usually a dominant male will grow 3 times

faster than all the other fish?

Btw.. Out of curiousity how muh do fronts retail at in NZ?

You an pay £10-£15 for them here in Ireland.

sorry for all the questions, :)

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hi,

frontosa don't reach breeding maturaty till 4-5yrs so i guess that has something to do with why they grow so slow.

very much worth the wait.

in my tank i have never noticed that male hormone thingie. the two colony's are all the same size,both males are alot bigger than the girls and the girl's are of equal size (7yrs) as with the males,they are still growing. they are in a 6-2-2, 9 adults.

calcite substrate and dolimite rock, ph 8.4 hardness 20. when i work in the tank for any length of time my hand's come out quite white and rough.

front's don't like the temp to hot 24-26max and hate fine air-bubbles eg. spray-bar running on surface of waterline.these are just some handy hints i've noticed over the years with these fish.

i not long sent some up north, they were 2 day's in bag's(due to courier foul-up)should have been overnight delivery,thank's to fantastic packing and fine weather all 6 fronts were fine and are swimming around happily in their new home. 41hrs all-up, so definitely proves my theory on temp.

you guy's are going to have alot of fun watching your front's grow, mystic your bubba's are growing well. :lol:

shell

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