Robert_ellis
Aquarium Advice Freak
- Joined
- Nov 6, 2012
- Messages
- 230
Could also be what salt is being used. I have a buddy who couldn't get the dkh he needed with reef crystals, changed to dnd salt and it instantly went to where he needed it.
is 7.6dkh kH, low?
- Thread starter daney90
- Start date
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jeffaquarius
Aquarium Advice Addict
+1 Same problem I had before. Now I am using Coralife.
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daney90
Aquarium Advice FINatic
Alright, I will not dose anything from now on and just have to do big water change to see if that will correct the problem. I'm going to start collecting my water now and maybe do 50% water change on Wednesday.
How many water change should I do before I should be consideing dosing?
How many water change should I do before I should be consideing dosing?
jeffaquarius
Aquarium Advice Addict
The 50% would do it in 1 shot. I would not dose as much as possible.
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daney90
Aquarium Advice FINatic
Ok I did a 50% water change last Friday and im about to test my water today. What is the best time to check my water if im concerned about the alkalinity?
jeffaquarius
Aquarium Advice Addict
Best to take readings is before lights are out since you need PH reading as well.
Gregcoyote
Aquarium Advice Addict
Immediately after lights off, that's when your PH will be highest. Morning before lights on should be lowest. Kh doesn't seem to vary the same way, so when it's convenient should be okay.
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daney90
Aquarium Advice FINatic
Alright so here is my water now. At 1.025 SG i have my pH at 8.1, kH=5.9, calc=420, mag=1280 (this is an hour after the lights turned off)
My freshly mixed water in the bin before i added it to the tank was
At 1.025 SG i had my
PH 8.2
KH 8.7
Calc 460
Mag1320
What should I do now? Been like weeks that my KH keep changing from 8 dkh and to as low as 4.3dkh
Edited
My freshly mixed water in the bin before i added it to the tank was
At 1.025 SG i had my
PH 8.2
KH 8.7
Calc 460
Mag1320
What should I do now? Been like weeks that my KH keep changing from 8 dkh and to as low as 4.3dkh
Edited
jeffaquarius
Aquarium Advice Addict
When did you switch to Kent and how many times have you done pwc? Your calcium reactor might be affecting it.
Daniel Fishy
Aquarium Advice Addict
I dose alk and cal daily 40ml of both. Alk 9.8-9.1 cal 400 sometimes I dose more cal to raise it. If you are lps or softie heavy your alk will lower quicker. I would dose two part like you been and when you test keep a log of how much you add and how the reading go up. Test daily until you figure out how much is needed to maintain proper levels then test bi weekly. I use kent salt alk is 9.1 and I have to dose. Things grow!!!!!
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daney90
Aquarium Advice FINatic
I switched to kent maybe a month ago or so. And I've been doing pwc every week 20-30% of the water. I pretty much have kent salt in the water of my tank now since I have used up more like 80 gals of the salt already. And ohh i don't have calcium reactor
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daney90
Aquarium Advice FINatic
Ohh I Forgot to mention when I tested my water earlier it was an hour after the lights when off cause i fell asleep lol
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daney90
Aquarium Advice FINatic
How would I determine how much to dose? I have dosed before and then stopped because i wasn't sure if i was doing it right. Do I dose gradually and increase the amount day by day? Or I have to dose an initial or starting amount (like 25 ml) and Then just a maintenance amount (maybe 5ml) everyday ?
jeffaquarius
Aquarium Advice Addict
Comparing your current readings to your previous readings it shows your Calc and Mag are dropping down as well as your KH.
NO4=2ppm
PO3=0.64ppm
Ca=535
KH=7.6
Mg=1420
Ph=8.2
That tells me your corals are consuming them. You should have taken the readings a day after your pwc and then 3 days after so you know how much they drop. I wonder if using both chemi pure and gfo together is a good idea.
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daney90
Aquarium Advice FINatic
Yeah I missed that step. I have recorded the water test I did a day prior to my water change though. It was PH at 8, KH-7, calc-435, mag-1240. Maybe I should wait another pwc this thurs or fri and do the test. But then should I leave my KH as is?
Daniel Fishy
Aquarium Advice Addict
I would 25ml in morning then that night test or if you have time test the next morning. Log it for a couple days and then you will figure out how much. If it went up one then try 30 when you get it were its safe then drop it down to half. Testing and logging you will see a pattern then you will know exactly how much to add were ever it's at. Took me two weeks.
Greenstreet.1
Aquarium Advice FINatic
Quick ? What's wrong with the alk being 7 I keep mine between 7-8 no higher and with your salt at 1.025 I don't think you should go higher than 8. With that said I had the same problem at startup I used baking soda mixed with rodi water to get my alk up then once where I wanted it I went back to esv there's a calculator you can use will try find it and post.
Greenstreet.1
Aquarium Advice FINatic
Reef calculators:
Reef.diesyst.com/cf/chemcalccf.html
If having problems with it let me know.
Reef.diesyst.com/cf/chemcalccf.html
If having problems with it let me know.
Daniel Fishy
Aquarium Advice Addict
Any where between 8-12. Stability is key, my lfs looks for around 10.5 in there tanks. Mine is 9.1-9.8. When my acans started to melt it was 5.6 they fully recovered and I'm seeing good growth in corals and clams.
Greenstreet.1
Aquarium Advice FINatic
Ok once it works for you but if your tank salt is at 1.025 there's a cal,alk,mag level to match your salt level look it up. If you use the calculator it will also tell you what your salt should be at when you cal,alk and mag is at a level.
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