View Full Version : Why is GH so high
moose1960
11-30-2002, 10:43 AM
I do not quite understand Gh vs KH. I am using Hagen test kits and i find my GH is way off the scale. I do know that GH is total hardness measureing all the salts etc. But isnt this too high.
I was going to add some crushed coral to my sand for buffering but am afraid to now.
GH is at 48 drops or 960 mg/L Caco3 which eguals 48 hardness,2.688 dh,3.36 ClarkH
I had some shells in and dead coral but removed them a week ago and it still raised over the week by 16 drops.
My salinity is beween 1.004 and 1.006 using marine salt.
KH stays steady at 7 or 8 drops = 70-80 mg/L,
Ph is 7.6
ammo=0
Nitites=<.03
Nitrates= 10~20
all using Hagen kits
GH is General Hardness, and measures only the calcium and magnesium ions in the water. TDS or total dissolved solids measures all dissolved materials, GH does not.
Sharyl C
11-30-2002, 5:09 PM
check your source water. If you use tap water to mix up you brackish tank water - this could effect your water quality.
Also your pH is low - it should be around 8.0
goldfish freak
11-30-2002, 10:24 PM
I don't know why your GH is so high but I am guessing that it is the salt because my GH measured 2040mg/l or 114.2dH as I was getting close to a specific gravity of 1.013.
moose1960
11-30-2002, 11:25 PM
RTR
So GH is the sum of magnisium ions and KH?
moose1960
11-30-2002, 11:28 PM
So like goldfish freak.Having high GH is normal in a brackish tank?
What is other peoples test results?
Sharyl C....ph has been dropping slighly, it was at 8 a few weeks ago. Any ideas on why when GH goes up PH is going down? Should I put the shells and coral back in?
No, GH is calcium and magnesium ion only. It has no direct and required relationship to KH. pH and KH are related and linked in natural waters. GH has no direct link or relationship to pH.
You KH and pH are too low for BW.
Agree that dwarf puffers do not belong in BW, they are FW.
moose1960
12-01-2002, 2:04 AM
Should I yransfer him right away into my FW tank or should I place him in a QT tank with same salinity and slowly bring it down. He is in 1.004 right now.
Here is a pic of when i got them. They were a gift and at first i was told they were figure eights then green spotted then finall after 3 weeks I was at the store my friend purchased them and they had them as dwarf. Here are 2 pics last one sorry for the size was taken on 10th nov
http://www3.sympatico.ca/m.d.nielsen/images/puffsail2.jpg
http://www3.sympatico.ca/m.d.nielsen/nov10/2002_1110_200101AA.JPG
goldfish freak
12-01-2002, 2:16 AM
That does not look like any dwarf puffer that I have seen. That looks exactly like a green spotted puffer. I have been to nearly every website on puffers on the net, and I have never seen a dwaft puffer look like that.Based on those photos I am certain that the fish were mislabeled.
moose1960
12-01-2002, 7:52 AM
so this then would be a brackish Puffer?
Yes, brackish for T. nigroviridis, the green spotted puffer.