Go Back   Aquarium Advice - Aquarium Forum Community > Community Forum > Aquaria Off-Topic
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 06-25-2020, 12:47 PM   #1
Aquarium Advice Newbie
 
Join Date: Jul 2015
Posts: 2
Out of control Ph

Warning: very long post.

1st I'll give you the complete history on this tank.
75 gallon tank I bought 6 years ago. Previous owner tried to keep African Cichlids but kept killing them. After a couple hundred dollars in fish he gave up.

The tank has older 350 magnum canister filter with ceramic and carbon media also a HOB biowheel penguin 300 with filter and charcoal. Gravel bottom with under gravel filtration with 4 bubblers.

I got the tank 5 years ago when My goldfish were getting too big for the tank and cleaning the tank became a 2-3X a week chore. 3 large goldfish did well in there for 3+ years had a Ph spike and lost 2. The last Comet GF got to be about 8" and also too big for the tank and sent him out to the farm koi pond. That was about 18 months ago. I kept the filters and bubblers going in the tank after doing a good 50% water change and gravel cleaning. and twice in the 18 mot=nths I cleaned the gravel and did a 50% water change.

Fast forward to about 3 weeks ago I wanted to get the water ready for tropical fish. Checked the chemistry and here is what it read:
pH 8.6
ammonia 0
nitrites-0
nitrates-10ppm
Did a 50% water change used Seachem Prime to treat the water, double dose. Water here is real hard and treated heavy with chloramines.
waited 24 hours and rechecked water only changes
Ph 8.4
ammonia slightly above .25ppm

Now I decided to checked my water at tap Ph 7.8 ammonia(chloramines) 10ppm My ph wasn't coming down on its own.

So I do a complete tank drain and cleanout below the gravel filters and everything. kept the biowheels in tank water. double dosed with prime again. and waited 4 days. ammonia was at .25ppm and ph jumped back up to 8.2. Now I still don't know WTH is going on with this tank.

I tried a whole bottle of API Ph down and barely moved the Ph and only temporary.down to 7.8 next day back up to 8.2

I read up on lowering Ph and with no fish yet. I could do drastic measures. so I used vinegar to try to drop it and after triple dosing over 5 days ph would only temporarily drop to 7.8 then it came back up. Now I'm pissed I drop in a 4X dose on vinegar and Ph dropped to 7.4 next morning a complete fog bank in the tank. I suspect carbon dioxide from the reactions of the vinegar. Waited 3 days and started to clear and checked water and
Ph 8.0
ammonia .25
nitrites 0
nitrates 10ppm

Something in tank is buffering the Ph. Now I am getting crazy about getting this Ph in check. I buy a reversed Osmosis system for our drinking water (I didn't tell the wife also for the tank). I spend 3 days storing 30 gallons of water for a change out and yesterday morning I did a 30 gallon water change. Water chemistry now:
Ph 8.0
ammonia 0
nitrite 0
nitrate 0

Also I forgot to mention previous owner had the Charcoal media filter blowinto the tank so in the gravel is mixed with some charcoal. Could that be buffering my Ph so anything I do I would have to do triple to make anything stick?
Do I keep doing water changes until it drops? Do I drain the whole tank and replace the gravel?
I'd love help. I really want fish in this tank but DO NOT want to kill anything if I can help it.
__________________

__________________
Mrfixit246 is offline   Reply With Quote
Old 06-25-2020, 07:21 PM   #2
AA Member
Community Moderator
 
Delapool's Avatar



POTM Champion
Tank of the Month Award
 
Join Date: Feb 2013
Location: Perth, Australia
Posts: 16,283
Do you have kh / gh (and other) readings for tap water at all? It sounds like kh is high so every water change will reset ph.


Carbon wonít impact ph but carbonate in gravel will eg crushed limestone or shells.
__________________

__________________
Delapool is online now   Reply With Quote
Old 06-25-2020, 09:03 PM   #3
Aquarium Advice Newbie
 
Join Date: Jul 2015
Posts: 2
Thanks for the reply.

I don't have test kit to read kh or gh, but I can tell you my tap water is very hard. The city water tests say the hardness is 38 grains.

I think you are onto the problem. for 18 months I added water when the level got low. the TDS is probably very high in the gravel. I am going to try a couple more 30 gallons water changes and I'll get a kh test kit. I'm using RO water now for the tank.

Thanks
__________________
Mrfixit246 is offline   Reply With Quote
Old 06-25-2020, 09:28 PM   #4
Aquarium Advice Newbie
 
Join Date: Jun 2020
Posts: 0
Help

Clown knife with bumps on head and chin
__________________
Sheena011006 is offline   Reply With Quote
Old 06-29-2020, 09:34 PM   #5
Aquarium Advice Newbie
 
Join Date: Jul 2015
Posts: 2
Update

I bought a Kh Gh test kit. My water in the tank before the water change out. was
Kh=214ppm
Gh=off the chart 14 drops
Ph=8.0

Did a 50% water change with RO water
Now the chemistry is:
Kh=125
Gh=175
Ph=7.6

Looks like Ph was being affected by the TDS from a couple years of putting in water without removing enough of the TDS. The gold fish I had in there initially didn't mind the higher Ph.

Thank You Delapool for your advice. Looks like you were right on!
__________________
Mrfixit246 is offline   Reply With Quote
Reply

Tags
control

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
Hair algae out out of control swurlboy Saltwater Reef Aquaria 15 05-28-2009 11:45 PM
Out of control algae! Hookman Saltwater Reef Aquaria 2 11-06-2003 10:18 PM
Ammonia levels are out of control...need help! tigger Saltwater & Reef - Getting Started 2 09-20-2003 11:03 AM
Plant growing out of control! nugrad2005 Freshwater & Brackish - Planted Tanks 6 06-13-2003 04:05 PM
Ammonia up - pH down - out of control and dead fish badwater Freshwater & Brackish - Getting Started 5 02-26-2003 01:24 AM







» Photo Contest Winners







All times are GMT -4. The time now is 07:14 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.