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10-25-2007, 10:55 AM
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#1 (permalink)
| | Bristle Worm
Join Date: Jan 2007 Location: Burlington, Ontario, Canada
Posts: 136
Karma: 15
 
|  DKH Question
What is the optimum and max DKH. My DKH is at 15 and I was told 12 is the max. If it is too high is there anyway to bring it down besides water changes and / or turning off my calcium reactor? _________ 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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10-25-2007, 01:23 PM
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#2 (permalink)
| | Giant Squid
Join Date: Oct 2006 Location: TN Age: 31
Posts: 3,606
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8-12 for reefs, higher will take care of algae problems  _________ Got Questions? Need Answers?
"Believe those who are seeking the truth; doubt those who find it." Andre Gide  | |
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10-25-2007, 02:19 PM
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#3 (permalink)
| | Bristle Worm
Join Date: Jan 2007 Location: Burlington, Ontario, Canada
Posts: 136
Karma: 15
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So higher is OK? | |
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10-25-2007, 03:00 PM
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#4 (permalink)
| | Giant Squid
Join Date: Jul 2007 Location: Miami Age: 39
Posts: 4,059
 
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my dkh is usually 13 and higher and I dont see any problems in my tank. _________ 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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10-25-2007, 03:33 PM
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#5 (permalink)
| | Giant Squid
Join Date: Oct 2006 Location: TN Age: 31
Posts: 3,606
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Plants cant grow in high dkh water (hard water) | |
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10-25-2007, 03:45 PM
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#6 (permalink)
| | Bristle Worm
Join Date: Jan 2007 Location: Burlington, Ontario, Canada
Posts: 136
Karma: 15
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What kind of sw plants are we talking about.
My concern would be mostly fish, inverts & corals. | |
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10-25-2007, 06:11 PM
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#7 (permalink)
| | Purple Tang
Join Date: Apr 2007 Location: joliet,il Age: 41
Posts: 1,831
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alot of things going on here, algae comes from having to much PO4. reefkeeping.com has a chart for balanced system requiments as far as Ca and dKH with Mg being the buffer. tune your calium reactor to 6.8 Ph on the effluent, adjust your effluent rate to the consumption rate of the tank. the calcium reactor is actually a dKH reactor. changing your effluent rate will change your Ph level unless you redue your CO2 bubble rate. once you get it tuned in no problems. sounds complicated but it isnt. the more CO2 the lower the Ph, the more effluent the lower the Ph with the same CO2 bubble rate. any questions please feel free to email me. | |
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10-25-2007, 06:18 PM
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#8 (permalink)
| | Bristle Worm
Join Date: Jan 2007 Location: Burlington, Ontario, Canada
Posts: 136
Karma: 15
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Thanks reef guru. Got it. Only thing is my DKH is high (15) and my Calcium is low (400) so I need to get the calc up and the dkh down. | |
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10-25-2007, 06:41 PM
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#9 (permalink)
| | Purple Tang
Join Date: Apr 2007 Location: joliet,il Age: 41
Posts: 1,831
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i came back in to send a second note, but anyway. the balance between Ca and dKH is rough but simple. the solution of the effluent is balanced. but to high for a tank. my tank parameters are 460 Ca, 14 dKH, 1500 Mg. which is ballanced for the most part. if you have a higher Ca then dKH, then add dKH, the levels will balance. and the opposite holds true according to the specifications on the label. that will only work if the calcium reactor is properly adjusted to the consumption rate of the tank. remember Mg is a buffer if its low the Ca and dKH wil swing alot. everyting has a maximum, i wouldnt go over 500 Ca, its not recommended. the consumption rate is more important. the tank ( corals ) will only consume so much, no need to poison the tank. so if your Ca is 400 and is staying steady, no worries. me personally i dont do water changes. some say its bad. again the consumption rate. if you do regular water changes remember the water being put in should match the same components, then your components will rise. if you do water changes with out adding components to the stock salt, then your components will lower. matter of physics. again simple yet complicated. first things first get your calcium reactor of the effluent of 6.8 Ph. depending on how heavily you tank is stocked with corals will depend on how much effluent comes out. whether its 20cc or 40cc. the Ph should be close to 6.8. most media will melt at that point. | |
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10-25-2007, 08:15 PM
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#10 (permalink)
| | Bristle Worm
Join Date: Jan 2007 Location: Burlington, Ontario, Canada
Posts: 136
Karma: 15
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OK...I'll keep working on it. The PH in my reactor is 6.5 presently. Any higher than 6.6 and it seems to stop disolving the media. | |
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