Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Fish Only & FOWLR
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 12-12-2009, 05:02 PM   #1
Aquarium Advice Addict
 
Floyd R Turbo's Avatar


 
Join Date: Feb 2009
Location: West Des Moines, Iowa
Posts: 1,682
Exclamation Need to raise pH, how fast is safe?

I am working on a FOWLR tank for a friend, 135g w/15 sump so 150g system volume. The pH is 7.4 and KH is about 4 dKH, salinity 32 SG 1.0235 and it's SUPER dirty. No protein skimmer (he's got one on the way) and it's been running for about 3 years. Cyano all over the place. I am going to do a 40 gallon PWC w/IO sea salt and RO water and clean all the Cyano and detrius out. Inhabitants are 1 dog-faced puffer, 1 Yellow Tang, 3 Sergeant Majors. He only has about 40-60 lb of LR. So lots of issue to tackle on this tank.

My question is this: the new water generally runs at a pH of about 8.2-8.4 and KH of about 7 or 8 after the salt is mixed in.

The way I calculate it, if he has 150g and I remove 40, that leaves 110g of 7.4 pH 4 dKH water. If I add 40 gallons of 8.4 pH 8 KH water, and go by a linear mixing calculation, then his pH will raise to 7.6 and KH will raise to just over 5. Is this an acceptable pH swing, or should I raise the pH/KH in his system prior to doing the water change?

I understand and pH is not a linear scale, but KH is. So my calculation may be off and I don't want to throw the pH too much too fast, for obvious reasons.

I was planning on dosing his tank with Brightwell Aquatics Alkalin8.3-P today before doing the PWC & cleaning tomorrow. The jar says exactly how much it will change the KH per unit dosed, but says nothing about how it will affect the pH, so I figure the less the better just in case.

The instructions say that you make a stock solution, and 1mL of this solution will increase dKH of 1 gallon by 0.36. It also says if the initial dKH is below 7, to add the maximum dose of 10ml per 20 USG (or 1/2 mL per gallon) until desired alkalinity is reached. This means that it would only raise the dKH of the entire system by 0.18 per dose. Is this considered to be the safest rate of increase of KH?

Anyone have any insights??

I just went through a calculation taking into consideration the logarithmic nature of pH and figured that the water change will raise the pH to about 7.9, or half a point. Is that acceptable? Or should I just do a 20 gallon change to be safe? That would raise it to 7.7-7.8.
__________________

__________________
Floyd R Turbo is offline   Reply With Quote
Old 12-13-2009, 05:01 PM   #2
SW REEF 18+ YEARS
Community Admin
 
melosu58's Avatar



Tank of the Month Award
 
Join Date: Oct 2004
Location: Virginia
Posts: 38,249
What is your PH about an hour before the lights go out?
__________________

__________________

SITE ADMINISTRATOR

You can view many of my fish and corals in my photo albums in my profile.

View my tank


AA Community Rules|AA TOS

Forums 101 - posting, accounts, basics
melosu58 is offline   Reply With Quote
Old 12-13-2009, 06:55 PM   #3
Aquarium Advice Addict
 
Floyd R Turbo's Avatar


 
Join Date: Feb 2009
Location: West Des Moines, Iowa
Posts: 1,682
it's not my tank, I will be going in tonight to check levels. Did about 30-35 gallon change. Sump was gross. There was at least 1 inch of waste at the bottom. I took 4 5 gallon buckets of sludge out. Plus he has bio-balls that were totally caked. Thankfully it all washed off (used fresh SW for that). I only had enough water left after sump cleaning to siphon about 1/4 of gravel, had to just suck the top layer off the waste was stuck to it.
__________________
Floyd R Turbo is offline   Reply With Quote
Old 12-13-2009, 11:43 PM   #4
Aquarium Advice Addict
 
Floyd R Turbo's Avatar


 
Join Date: Feb 2009
Location: West Des Moines, Iowa
Posts: 1,682
What happens when you don't clean a tank for 3 years

WARNING: What you are about to see is real. The names have been changed to protect the innocent. You may feel the need to hurl after looking at these pictures. :spin2:

This tank has been up and running for about 3 years and never has had even a minor cleaning done. This is why I got decided to go into business maintaining aquariums after much debate; the fish deserve it.

The following pictures are broken into a couple of posts; before, during and after cleaning:

DT



Sump Inlet tower side



Pump side barrier (it turns out there was a sponge in there)



Here is the sponge




I discovered Bio-balls (customer said there weren't any in there!!)

__________________
Floyd R Turbo is offline   Reply With Quote
Old 12-13-2009, 11:44 PM   #5
Aquarium Advice Addict
 
Floyd R Turbo's Avatar


 
Join Date: Feb 2009
Location: West Des Moines, Iowa
Posts: 1,682
What happens when you don't clean a tank for 3 years; continued

2 of the 5 buckets like this I siphoned out of the sump



Oooh - so pretty!!



Hey, there are those bio-balls! I only left them in there because he doesn't have enough LR. Otherwise they would have gone bye-bye



Still have to fix the sump base. An overflow somewhere along the line cause the base of the stand to bow, sump isn't level or supported on this end. Salt creep was by the handful



Cleaned the overflow slots - tank was full and pump was sucking air



After all that, only had 1/4 of the water I mixed up (10 out of 40 gallons) to clean the DT. I got about 12-16 inches across one side siphoned off with a 3/4 ID hose, just sucked the top layer off and tossed it. 10 gallons went in about 3 minutes since the top of the tank is 7 feet up.

Before:



After:



After I get the LR cleaned up and the top layer all siphoned off, I'm gonna shove all the old gravel to one side and put in a new layer of Argonite sand and eventually remove all the old stuff. But that's a ways off. Right now I'm working on cleaning the system without killing any more fish.
__________________
Floyd R Turbo is offline   Reply With Quote
Old 12-14-2009, 12:48 AM   #6
Aquarium Advice Freak
 
dannyb's Avatar
 
Join Date: Sep 2009
Location: Victoria, Australia
Posts: 438
Wow. Just wow.

That would of smelt so so nice.
__________________
dannyb is offline   Reply With Quote
Old 12-17-2009, 02:11 PM   #7
Aquarium Advice Addict
 
thincat's Avatar
 
Join Date: Nov 2008
Posts: 5,330
That's one strong "Puffer"!
Nice job...
__________________

__________________
Happy Reefing,
TC
thincat is offline   Reply With Quote
Reply

Tags
safe

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to raise Kh m-man Freshwater & Brackish - Planted Tanks 5 08-13-2006 05:44 PM
How fast can you raise CA levels safely? Brenden Saltwater Reef Aquaria 4 11-07-2005 10:53 PM
is it safe to raise temp to 86? xahx Saltwater & Reef - Sick Fish or Coral 8 02-12-2005 01:39 PM
How fast can pH rise and be safe? jamal-188 Saltwater Reef Aquaria 8 06-18-2004 01:40 AM
what to use to raise Ph muzanji Saltwater Reef Aquaria 3 08-27-2003 01:26 PM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 09:46 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.