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10-18-2007, 01:16 PM
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#1 (permalink)
| | Giant Squid
Join Date: Jul 2007 Location: Miami Age: 39
Posts: 3,782
 
|  Another Question About Ph
Can anyone explain what causes ph to drop? The only way that I can keep my ph at 8.2-8.3 is by adding what tangster recommended( arm & hammer ) and it works for a couple of hours and then goes back to 7.9-8.0. Then I have to wait a couple days so my alk can drop to use A & H again to raise the ph. A & H also raises my alk, and it is usually high already. When using A & H, should it be poured in the morning or night when the lights are off or on?
I just tested my water and here are the results:
ph-8.0
amnonia-0
nitrites-0
nitrates-20ppm
cal---440
dkh---16.0
alk--5.71
mag---1420
phos---0 _________ 9YR OLD 90G 30G w/d Mag18 150G skimmer 692w MH,yel&kole tang,foxface,midas&convict blenny,B&G chromies,Blk/yel fin chromie blackcap,nemo,neon goby,6line; Blastomussa Merleti,Acan ,BUBBLE,Torch,LTA, Goniopora(2), Acropora(2),Brain, Moon, assort zoas, yel& G star polyps, R&G open brain, P&B ricordia, montiporas, cup&candy corals, enias,B/G mush,flower ane(2), cherry red mussa, dusters,cleaning crew  | 
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10-18-2007, 01:20 PM
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#2 (permalink)
| | Corkscrew Tentacle Anemone
Join Date: Feb 2007 Location: Miami,Fl
Posts: 737
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If I recall correctly your ph is lowest in the morning before the lights come on, so I guess you should add it in the morning before the lights come on. I would get a second opinion though. _________ 90 gallon tank with center overflows, 44 gallon custom sump/fuge, Tek T5 retrofit 4x54 bulbs, Reef Octopus nw200 protein skimmer, Iwaki WMD40RLXT return pump (changed to panworld 100pxx),Knop c ca reactor, PA light house controller.
Click: Real-Time Stats 
^^ Testing it out! Ill add more param.. later. | |
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10-18-2007, 01:48 PM
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#3 (permalink)
| | Spaghetti Worm
Join Date: Aug 2007 Location: Atlanta, GA Age: 46
Posts: 185
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I would rather have a steady 8.0 than bouncing back and forth from 8.3-7.9 but thats just my opinion.
I think we get hung up on the "perfect numbers" sometimes when steady as she goes is a better deal. Thats just my opinion too!  | |
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10-18-2007, 02:19 PM
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#4 (permalink)
| | Giant Squid
Join Date: Jul 2007 Location: Miami Age: 39
Posts: 3,782
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Hey jim, I think your right about that. Thats why this hobby is referred to as an obession, Always trying to get the perfect numbers. In reality, we're just trying to copy mother nature's perfection. | |
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10-18-2007, 02:47 PM
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#5 (permalink)
| | KingFish
Join Date: Dec 2000 Location: Pt. Richmond, Ca. Age: 38
Posts: 7,339
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Quote:
Originally Posted by jimw369  I would rather have a steady 8.0 than bouncing back and forth from 8.3-7.9 but thats just my opinion. | You can use 'reverse daylight photosynthesis' with a refugium to help stabilize it. Have the lights of the refugium and overlap for about an hour.. fyi. | |
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10-18-2007, 03:53 PM
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#6 (permalink)
| | Zoanthid
Join Date: Jul 2006 Location: valencia,pa. Age: 34
Posts: 1,112
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i use wardleys ph up.thats what i used when my calcium was getting very high.i raised ph and calcium went down.my ph also dropped when i put some uncured rock in my tank.once again i used wardleys ph up and it went up and stayed.
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55 gallon reef with 4x54 watt t5,29 gallon sump,red monti cap,1blue echinophyllia,trumpet,red lobo,2 toadstools 1purple and 1neon,gsp,xenia and yellow xenia,red ,many mushrooms,2 giant frilly shrooms,cabbage coral,yellow polyps,many zoos,1 orange and one neon green nepthia,duncans,cladiella | |
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10-18-2007, 04:23 PM
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#7 (permalink)
| | Bristle Worm
Join Date: Jan 2007 Location: Burlington, Ontario, Canada
Posts: 136
Karma: 15
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PH will always go down after the lights go out and therfore will be lowest in the morning. I don't know about A&H but normally you use a PH up just before the lights go out so there isn't as much of a spike.
Are you using a calcium reactor? If yes the PH in your reactor may be too low. When my reacor is working my PH is always 8.0 - 8.1 and when I turn it off my PH goes to 8.3. I think a stable 8.0 is fine. If I use PH up it never stays for long. Also your DKH looks high, so is mine, but I was told 12 should be a max. This may affect your PH also. Just my observations. _________ 125gal Reef/Fish,40gal sump,Reefmania calcium reactor,MH,UVH,Moon,Aquazone plus 100,Auto Topoff,CoraLife 125 skimmer,GHL Profilux computer & special effects lighting.
Fish:Coral Beauty,Yellow Wrasse,African Clown Wrasse,BiColor Anglefish,Banded Goby,Psycodelic Mandarin Goby,Spotfin Angelfish
Inverts:Long-spinned Urchin,Crowned Urchin,Feather Dusters,Fire shrimp,Banded Shrimp,Brittle Star,snails
Corals:Cup,Frogspawn,Pink Open Brain,Yellow Dot
Zoanthid,White Tree,Leathers  | |
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10-18-2007, 04:29 PM
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#8 (permalink)
| | Giant Squid
Join Date: Jul 2007 Location: Miami Age: 39
Posts: 3,782
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Quote:
Originally Posted by bulltrader PH will always go down after the lights go out and therfore will be lowest in the morning. I don't know about A&H but normally you use a PH up just before the lights go out so there isn't as much of a spike.
Are you using a calcium reactor? If yes the PH in your reactor may be too low. When my reacor is working my PH is always 8.0 - 8.1 and when I turn it off my PH goes to 8.3. I think a stable 8.0 is fine. If I use PH up it never stays for long. Also your DKH looks high, so is mine, but I was told 12 should be a max. This may affect your PH also. Just my observations. | Hey baxter, No I dont have a ca reactor. I know that ph, alk, dkh, cal all coinside. I also know about the light effect. Its just frustrating to watch one aspect of doing fine and the other going down hill. It seems that I cant find a middle ground. | |
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10-18-2007, 05:31 PM
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#9 (permalink)
| | Giant Squid
Join Date: Jan 2006 Location: Meriden, Connecticut Age: 43
Posts: 3,905
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I use kalkwasser and dose it at night when your pH will tend to drop due to photosynthesis shutting down! As Matt suggested, a refugium with reverse daylight will help some.
Again, I like the dosing with kalkwasser as it has a pH of 12 to keep you pH elevated! _________ 125gal.w/Mag9.5 return(dual megaflow)>Mag7 pump Aqua Cev180skimmer.Wave2k Hamilton Reefstar(2)250watthqi(mh)pend.a Yellow, Naso Tang Red Lip Blenny Percula Clown Demoiselles Niger Trigger F. Wrasses Ceriantharia Orn.Shrimp and Stars Hermits Queen Conch asst. snails> Stars Zoos shrooms Montipora Brains Gorgonians Favia Turbinaria(large+small polyp) Acropora Xenia Tridacna (CroceaMaximaSquamosa) Leathers <35+75gal.reef tank as well> 
"IF THE PHONE DOESN'T RING...IT'S ME"  jb  | |
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10-18-2007, 06:25 PM
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#10 (permalink)
| | Zoanthid
Join Date: Jul 2006 Location: valencia,pa. Age: 34
Posts: 1,112
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my sump lights only go out during the 4 hottest hours of the day | |
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