PDA

View Full Version : high kh/ca


drd
09/28/2009, 08:57 PM
help
my nano cube 28 has high kh/ca readings.
kh 14 degrees
ca 750 ppm
mg 1350
phosphate 0 ppm* must have a trace amount but undectatable
nitrate 0 ppm * must have a trace amont but again undectable
temp 78
salinity 1.021
amnonia 0 ppm
nitrite 0 ppm
most of the tests are done with elos test kits except phosphate and nitrate those are saliferts and i would like to get them down to ca 425 ppm and kh at 11 any suggestions
note the tank has a pair of yashia gobies and a bi color blenny as well as a purple dottyback with some acans and other lps as well as some r lmtd edition corals too
thank you
drd:fish2:

NYG 010
09/28/2009, 09:13 PM
I'm cycling right now (2 weeks in with live rock and sand) and my Kh is the highest level on the chart at 240 ppm!! Let me know if you get a solution!

koranAngel
09/28/2009, 09:25 PM
kh seems fine for corals
how did u manage to such high cal

well the only way u might b able to drop cal is water change do 30% to 50%
will drop it down

let me know how it goes

atkinsg
09/28/2009, 09:25 PM
Do water changes to get the levels down. Are you doing anything like a Ca/Alk 2 part solution? If you are, stop until you get your Ca/Alk where you want it.

bertoni
09/28/2009, 10:17 PM
14 dKH isn't high enough to cause problems in most cases. I might do some water changes, but I doubt that they are going to do all that much. The most common cause of high alkalinity is the use of pH buffers, which all add alkalinity.

drd
09/29/2009, 07:38 PM
I have not added any two part kh/ ca supplements since 08-29-09 and the levels have not come down so I am thinking of doing 10% water changes to bring it down to where I should be then wait till the corals start using up ca before I am adding again

bertoni
09/29/2009, 09:55 PM
I would check the dKH of some freshly-mixed saltwater, and see what that measures. Is tap water being used for topoff? Tap water can contain a fair amount of alkalinity,

JeF4y
09/30/2009, 11:40 AM
What is your pH? if it's super low, you could be dissolving your substrate/rock and increasing your CA/ALK. Not sure if that's possible to the degree you show, but maybe???

drd
09/30/2009, 11:44 AM
ph 8.3

ROBLOW
09/30/2009, 06:27 PM
14 dKH isn't high enough to cause problems in most cases. I might do some water changes, but I doubt that they are going to do all that much. The most common cause of high alkalinity is the use of pH buffers, which all add alkalinity.


why do people say this? when ever i get high alk it burns the tips of some of my coral..:eek1:

Billybeau1
09/30/2009, 06:36 PM
drd, I doubt your calcium level is that high. Either test kit malfunction or user error. I suspect. I'd get a second opinion.

I'm also concerned that your specific gravity is measuring so low. How do you measure s.g ?

Billybeau1
09/30/2009, 06:41 PM
why do people say this? when ever i get high alk it burns the tips of some of my coral..:eek1:

Because for many years in the 80's, the Germans used to keep their reef tanks much higher (15-18 dkh) with no problems. We do not recommend that today, however, I doubt the burned tips is always caused by high alkalinity. There are a number of things that can cause burnt tips on corals.

ROBLOW
10/01/2009, 07:16 AM
Because for many years in the 80's, the Germans used to keep their reef tanks much higher (15-18 dkh) with no problems. We do not recommend that today, however, I doubt the burned tips is always caused by high alkalinity. There are a number of things that can cause burnt tips on corals.

Like what?

Billybeau1
10/01/2009, 07:30 AM
Well, you'd have to ask the coral experts that question as I am not one. I have heard of undissolved supplement falling on the corals as well as lighting being a problem just to name a couple. ;)

Percula9
10/01/2009, 09:57 PM
What brand of salt are you using? Some salts are high in alk and calcium. Try measuring a fresh batch before you put it in. I agree that your calcium reading maybe testing error. Have your LFS take reading on your water to verify your results.:beer:

drd
10/02/2009, 12:28 PM
NSW Local fish store did, aquarium works did and got the same results

Billybeau1
10/02/2009, 12:36 PM
I honestly do not know how your calcium got so high. Have you tested a batch of new before adding it to the tank ?

anemone123
10/02/2009, 01:41 PM
I'm surprised it doesn't look like the aquarium is snowing with that much high of levels. I one got a tank to 500ppm cal and 17kh and it looked like a snow globe inside the tank. The calcium precipitated out.

drd
10/02/2009, 02:45 PM
has not snowed but I am not adding any supplements at this time