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Please advice me that kind of softenizier it would be better if I got KH 9 (since of Iwagumi in the tank) 16 gal (75 L)
How often I should change the Ion Exchanger Resin Refill or 250 ml for how long is it ?

ianryeng

Im sorry im not sure I completely understand your question, do you have this or are considering buying it?

In terms of resin it appears to be standard cation ion exchange resin. The volume of your tank has less of an impact than the frequency of the water changes and the flow rate. Probably once a week you would want to 'flush' the resin with a hyper-saline solution (saturated salt water)

How hard is the water out of your tap?

If you are trying to achieve a specific hardness this is probably not the ideal way to treat the water since it appears to be an attachment to a canister filter (please correct me if I am wrong) and would slowly soften your water over time which would have to be calculated using a half-life equation. The problem with that? your water will be hardest after a water change and potentially very soft after an unknown period of time. Regardless, if it is a stable KH you are trying achieve that is not the way to do it in my opinion since this gradual reduction in hardness will also correspond to other parameters changing...

Philosophos

Ion exchange resins have one major issue of exchanging KH from calcium/magnesium and replacing it with sodium. Personally, I'd rather just deal with the carbonate rather than elevating the sodium levels.

RO and aquasoil are the best methods I've found for keeping things in check. Peat is commonly used, but it'll stain your water horribly which is probably not the look you're going for with iwugami. I do know that some apisto breeders use phosphoric or nitric acid to take care of things as well, but that's a bit more tricky.

-Philosophos

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In other words you do not recommend a softenizer for Iwagumi freshwater tank any way. The problem is that I have to change water several times a week since the stones rising the KH appreciably, that's fine with helferi but not so opportunely for HC. PH has risen also. I've got Amazonia II no RO, lots of Seiryu stones

Philosophos

I don't recommend getting sodium ion exchange resins near anything that doesn't at least like brackish water.

To figure out what exactly is going on, and how to deal with the issue, it would be helpful to know a bit about your tank and tap water. What size is the tank, what KH is it now, and what KH is your tap? pH would be helpful as well, but not necessary; your pH will fall as the KH is fixed.

-Philosophos

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Hi,

Tank -75L Ferplast Cayman PRO
Dennerle light: 2 x 24W*T5 (Amazon Day & Color Plus)
filtration: JBL CristalProfi e900
ADA:Power Sand Special + AquaSoil Amazonia II, Seiryu Stones, Brighty K, Step II

tap water KH 6, pH 7, GH 9
tank water KH 9, pH 7,5 GH 11
CO2 - 3 bbl per sec

Some images of my tank is in signature and here

Philosophos

Your tap water is probably reading 7 because of high CO2 saturation levels when pouring it. With a KH around 6 I'd kind of expect a 7.4-7.8ish pH, though other things will effect it.

Just to be thorough, test the stone; stick some in tap water with nothing else, and keep some other tap water on the side without the stone as a control. Test both after they soak for a few days. Perhaps try some in RO/DI H2O and see how long it takes to rise.

If it's coming from the rock, you've got a bit of a problem. The most I could recommend is experimenting with a clear coat of epoxy. If the clear coat isn't noticeable, then you've got a solution. Everything else would be comparatively more frustrating.

-Philosophos

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Your help is very much appreciated now I also consider that sodium ion is much worse then carbonate

bosmahe1

Philosophos,

I thought calcium and magnesium affects GH. It affects KH as well?

Philosophos

Anything that can haul along CO3 with it is carbonate; CaCo3, MgCo3, FeCO3, etc. In fish tanks it's Mg and Ca that make up the vast majority of carbonate.

-Philosophos