Reef Central Online Community

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > The Reef Chemistry Forum
Register Blogs FAQ Calendar Mark Forums Read

Notices

Reply
Thread Tools
Old 07/26/2017, 12:14 PM   #1
JTL
Registered Member
 
Join Date: Jun 2003
Location: Venice, FL
Posts: 1,780
When should I start Kalk

My Ca is 500 and my Alk is 10. pH is consistently 8.0. Just started adding some corals and few lps and sps, the easier ones.


__________________
John

100g DT, 50g sump with refugium, Photon 48 v2 lights, RO 150 INT skimmer.

Current Tank Info: 100g, 50g sump
JTL is online now   Reply With Quote
Old 07/26/2017, 12:43 PM   #2
mcgyvr
Registered Member
 
mcgyvr's Avatar
 
Join Date: Sep 2003
Location: North Carolina
Posts: 10,259
When your current water change schedule isn't sufficient to keep your levels stable enough..
We can't tell you when that will be.. too many variables..

You just need to be monitoring (testing) and see when/if thats happening..
Decide on whats an acceptable alk "range/swing" and when its falling out of that between water changes then its time to start dosing..
Plain and simple..

example..
I think most will say that a swing of up to 1 dKH isn't an issue anymore and you start to have issues..
So if your alk is dropping below 9 between water changes then its time to start dosing (or increasing your water change schedule)..


__________________
Being blunt and having fun
mcgyvr is online now   Reply With Quote
Old 07/26/2017, 12:49 PM   #3
JTL
Registered Member
 
Join Date: Jun 2003
Location: Venice, FL
Posts: 1,780
I had to buffer Alk to get it up to 9 from 8. I thought the time to start Kalk is when the Ca and dKH were in the range in order to keep it there. I could use a little more pH also.


__________________
John

100g DT, 50g sump with refugium, Photon 48 v2 lights, RO 150 INT skimmer.

Current Tank Info: 100g, 50g sump
JTL is online now   Reply With Quote
Old 07/26/2017, 02:32 PM   #4
JTL
Registered Member
 
Join Date: Jun 2003
Location: Venice, FL
Posts: 1,780
I am just starting to add Ca loving corals so I expect my levels to drop. I kind of understand. Once things stabilize based on the Alk and Ca demands than use Kalk to try to keep them in the range without using two part. It has been a few years and my memory is not what it once was. In the mean time I will just use two part to keep everything copacetic.


__________________
John

100g DT, 50g sump with refugium, Photon 48 v2 lights, RO 150 INT skimmer.

Current Tank Info: 100g, 50g sump
JTL is online now   Reply With Quote
Old 07/26/2017, 04:07 PM   #5
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 85,136
I agree that your alkalinity kit will tell you when you need to start dosing. I'd measure once a week or so and watch the trend line. Twice a week might be appropriate for a bit here, since the demand can change fairly rapidly.


__________________
Jonathan Bertoni
bertoni is online now   Reply With Quote
Old 08/12/2017, 10:57 AM   #6
JTL
Registered Member
 
Join Date: Jun 2003
Location: Venice, FL
Posts: 1,780
My alk is at 10 using a buffer and by Ca stays pretty consistent at 500-520. Should I just keep using a buffer to keep the alk up? I'm afraid if I start to us kalk my Ca my get too high.


__________________
John

100g DT, 50g sump with refugium, Photon 48 v2 lights, RO 150 INT skimmer.

Current Tank Info: 100g, 50g sump
JTL is online now   Reply With Quote
Old 08/12/2017, 12:53 PM   #7
Sk8r
RC Mod
 
Sk8r's Avatar
 
Join Date: Feb 2006
Location: Spokane WA
Posts: 32,605
Blog Entries: 53
Wait until your levels start to need regular dosing to keep them steady. When corals really start eating, you'll notice. Until then, yes, it does kind of pile up.


__________________
Sk8r

Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low.

Current Tank Info: 105g AquaVim wedge lps reef: 3 firefish, yellowhead jawfish, yellow watchman, 3 chromis, tailspot/starry blennies, pink margin fairy wrasse, mandarin, kalk, radion pro, gyre, Eshopps s-200 skimmer, basement sump.
Sk8r is offline   Reply With Quote
Old 08/12/2017, 01:25 PM   #8
JTL
Registered Member
 
Join Date: Jun 2003
Location: Venice, FL
Posts: 1,780
I need to dose alk weekly to keep the levels up but Ca stays pretty much at 500.


__________________
John

100g DT, 50g sump with refugium, Photon 48 v2 lights, RO 150 INT skimmer.

Current Tank Info: 100g, 50g sump
JTL is online now   Reply With Quote
Old 08/12/2017, 08:05 PM   #9
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 85,136
That's fairly normal for a tank with a lower demand level. Dosing alkalinity only is fine as long as you are careful about watching the calcium level. Eventually, water changes might not keep up with demand, but until then, dosing alkalinity by itself is okay, although using a two-part is more error-proof.


__________________
Jonathan Bertoni
bertoni is online now   Reply With Quote
Old 08/13/2017, 08:22 AM   #10
JTL
Registered Member
 
Join Date: Jun 2003
Location: Venice, FL
Posts: 1,780
I just tested with a newer kit and the Ca is now 480 and the alk is 11. Not sure what numbers I should shoot for but I am getting close to what I think would be good. I usually do a 10% water change on Mondays so I will check all the params then. I would prefer to use Kalk and not mess with two part. I have more corals arriving on Tues so the dynamics may change a little.


__________________
John

100g DT, 50g sump with refugium, Photon 48 v2 lights, RO 150 INT skimmer.

Current Tank Info: 100g, 50g sump
JTL is online now   Reply With Quote
Old 08/13/2017, 03:51 PM   #11
Vinny Kreyling
Registered Member
 
Vinny Kreyling's Avatar
 
Join Date: Nov 2002
Location: Miller Place, NY
Posts: 4,620
11 is on the high side as NSW runs 7-8,
Calcium is also slightly high but not as bad as Alk.


__________________
250 gallon mixed reef, Vectra L1 pump, Vertex Illumina LED, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 4 Tunze pumps.
Vinny Kreyling is online now   Reply With Quote
Old 08/13/2017, 06:07 PM   #12
JTL
Registered Member
 
Join Date: Jun 2003
Location: Venice, FL
Posts: 1,780
I think the alk will come down with a wc and no buffer. The Ca is another issue.


__________________
John

100g DT, 50g sump with refugium, Photon 48 v2 lights, RO 150 INT skimmer.

Current Tank Info: 100g, 50g sump
JTL is online now   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -6. The time now is 05:49 PM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014