All times are UTC + 8 hours




Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Sep 20th, '14, 18:57 
Offline
Legend Member
Legend Member

Joined: Mar 19th, '11, 19:40
Posts: 749
Gender: Male
Are you human?: YES
Location: Perth
I've been away from the forum for a while so my AP knowledge is a bit rusty.
Anyway , I still have my 4 bathtub/1 IBC system which I haven't bothered to give too much attention for over a year. PLants that are doing well are parsley, leek, lebanese cress, laksa, beetroot, broccoli.
However, sugar snaps ,capsicum, lettuce and rocket struggle badly.

Today I tested the water for first time in over a year. To my horror:
Image

pH 6 or less
NH3 2 to 4
NO2 0
NO3 off the chart!

I have 25 3yr old silver perch and about 10 10cm ones
Last death was about 1 month ago of a 10cm. Apart from that no fish problems at all.
The fish seem lively and still feeding but not with their usual gusto.

PLease confirm I am doing this right to remedy this:
1. stop feeding
2. constant pump
3. add Ecofungicide at 1 scoop to1000L to bring up the pH
4. harvest a few fish

Is there anything else I should be doing?
Is pH7 the ideal pH?

_________________
my bathtub and IBC system
viewtopic.php?f=18&t=9848


Top
 Profile  
Reply with quote  
    Advertisement
 
PostPosted: Sep 20th, '14, 19:22 
Offline
A posting God
A posting God
User avatar

Joined: Nov 7th, '12, 19:48
Posts: 2359
Gender: Male
Are you human?: YES
Location: Warragul
You have rain water? You could put some in - yes PH gently

_________________
current system build
IBC system retired
Barrels&IBC in the greenhouse system retired


Top
 Profile  
Reply with quote  
PostPosted: Sep 20th, '14, 20:28 
Offline
Almost divorced
Almost divorced
User avatar

Joined: Apr 1st, '13, 21:21
Posts: 1344
Gender: Male
Are you human?: yes
Location: Balcatta WA
I would reduce feed rate and check for dead things in the water.

if you don't have rain water you will get some Sunday morning, storm alert.

_________________
My Pool to Pond


Top
 Profile  
Reply with quote  
PostPosted: Sep 21st, '14, 04:08 
Offline
Legend Member
Legend Member

Joined: May 15th, '13, 04:38
Posts: 508
Gender: Male
Are you human?: Yes
Location: USA, Northern California, SF Bay Area
Don't do anything about the pH until you get the ammonia down. With ammonia levels that high is there a dead fish stuck somewhere?

_________________
Now on my blog: Aquaponic Water Testing Info roundup


Top
 Profile  
Reply with quote  
PostPosted: Sep 21st, '14, 05:36 
Offline
Newbie
Newbie

Joined: Sep 20th, '14, 02:58
Posts: 16
Gender: Male
Are you human?: yes
Location: USA Heartland
At a pH of 6.0, your un-ionized ammonia concentrations may still be tolerable. But if you raise the pH, the un-ionized ammonia concentration will increase many-fold, potentially creating a toxic ammonia spike for your fish.

Reduce feeding or reduce fish biomass until your ammonia levels have dropped. Get out your chart for pH and un-ionized ammonia concentrations.

_________________
"It is not so much that I have confidence in scientists being right, but that I have so much in non-scientists being wrong."
- Isaac Asimov -


Top
 Profile  
Reply with quote  
PostPosted: Sep 21st, '14, 22:00 
Offline
Legend Member
Legend Member

Joined: Mar 19th, '11, 19:40
Posts: 749
Gender: Male
Are you human?: YES
Location: Perth
Harvested 2 fish today. Well, caught 1 with a prawn on a hook, then saw another big one languishng at the bottom of the tank. Netted it and it was barely alive.
It had red marks on both sides of its gills but apart from that it looked fine. It also had roe in it.

diagnosis?

Image
Image


rest of the fish looked fine. 35cm long, that thing near its tail is just a bit of wood.

Image

_________________
my bathtub and IBC system
viewtopic.php?f=18&t=9848


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC + 8 hours


Who is online

Users browsing this forum: No registered users and 27 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

Powered by phpBB® Forum Software © phpBB Group
Portal by phpBB3 Portal © phpBB Türkiye
[ Time : 0.100s | 18 Queries | GZIP : Off ]