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Discussion Starter #1
For starters I added another 2L bottle to my DIY co2 monday.Taht makes 2 in all. Within 24 hours I had green water and 2 dead fish. So Thursday I did a 75 percent water change and cleaned my substrate. This morning after a 2 hour photo period I check my water. Results as follows:
pH 6 :icon_frow
kH 5 degrees
gH 1
Ammonia 0
NO3 0
Phosphate ?
iron?
Potassium?
According to the co2 chart I over 100 ppm. There is no way. What gives.
:icon_conf
 

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That is what i got too. A Ph of 6 and a Kh of 5 would = 150 ppm of co2. Your Ph should not be any lower than 6.6. The Co2 of 150 would kill fish but i dont think it would cause green water unless you have too much nutrients in the water. My suggestion is to raise the Ph to 6.6 by means of degassing the water or less Co2 and or more water circulation.
 

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It's hard to believe you can get that much co2 from 2 2liter bottles in a 75. My guess is that your ph or kh kits are off - I would look into that.

You say your nitrates have zeroed out. That's part of your problem. Get those up around 10ppm, get your phosphates around 2-3ppm and make sure you're dosing your micros. Your tank is out of whack (balance).

You've started towards correction - major water change, gravel vac etc. Then figure out what your real co2/kh/ph is, and start a regular dosing regimen. Good luck.
 

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Perhaps the mixture got sucked into the tank?
 

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Discussion Starter #5
I don't think my ph kit is that off but it may. I have done numorus test with the kit" Hagen Master Kit". As for the mixture leaking into the tank problem, I run the outfeed co2 line through an 3rd bottle of plain water to prevent that.
I am getting @ 1.75 to 2 bubbles a second through my Eheim intake. Before I added the second bottle I was getting .75 to 1 bubbles a second. My pH was 6.8 and kH was 4 then.
My ferts should be here today. I will start EI tomorrow. Is there anything else that has to in line for the pH/kH co2 chart to work? Please comment if you can. :icon_conf
 

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ok then, could be your DIY is really effective. Too much CO2/low ph => dead fish => NH3/NH4 => green water. NH3 can be unmeasureable and still cause green water, according to Tom. Or is dead fish coincidence, have you added new fish lately?
 

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Discussion Starter #9
I haven't added new fish in 3 weeks. I did notice when I added the second bottle my dano's laid down on the substrate. That was wierd because those crazy fish act like they are on crack. The never stop moving. My gouramis were gaspong a little but my rasboras were fine. Within 12 hrs one zebra and one gourami was dead. They seem to be fine now eating and everything. That was of 12 pm Friday. I will be getting off in thirty minutes. When I get home I'll check everything again.T hanks for all the comments. This site and you guys are awesome. I will post my results tonight. :icon_roll
 

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Discussion Starter #10
To update, when I got home this morning I started to degass my water by means of an airstone. I later checked my ph/kh it was ph 6.8 kh 6 :) . I also went to my LFS to get some loaches, frogs, swords and some Equillebrium. It is sosposed to raise my gh. It did :) . Now I am just waiting on my ferts to come in for GW. Sad thing is I think my green water is trying to come back :icon_frow I have a UV sterilizer on order as well.
 

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My guess would be that the DIY overdosed your tank and the decaying fish gave you green water. I've had this happen before.
 

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I had GW in the begining(who doesnt)butt i got around it by reading and meeting some people on plant tank site like this one. They helped me and still are helping to make my tank balance out which is going well. The uv steralizer is a waste of money imo. It does nothing to fix the root problem which cause the GW in the first place. My advice is to read as much about plant tanks as you can. Then you can chose a fert. system that will work best for you like pps and ei both are very good system. Which will fix the imbalance of your tank thus getting rid of GW.
 

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qoperator said:
I haven't added new fish in 3 weeks. I did notice when I added the second bottle my dano's laid down on the substrate. That was wierd because those crazy fish act like they are on crack. The never stop moving. My gouramis were gaspong a little but my rasboras were fine. Within 12 hrs one zebra and one gourami was dead. They seem to be fine now eating and everything. That was of 12 pm Friday. I will be getting off in thirty minutes. When I get home I'll check everything again.T hanks for all the comments. This site and you guys are awesome. I will post my results tonight. :icon_roll
Look, try using a DIY CO2 reactor, there's one on my site and plug it into the light timer.

Use 2 bottles staggered.

Now, go get a Gas tank CO2 system and do a 75 gallon tank right.
DIY can be variable, it'll produce a lot in the first few hours/day and then decline.

The DIY reactor is good at self regulating the amount of gas going into your tank.

A lot of DIY fed into the filter will effect the bacteria which could have encouraged the GW due to changing the NH4 till the bacteria adapted.

It sounds like it was a CO2 over dose to me.

Regards,
Tom Barr

3rd annual Plant Fest July 8-14th 2005!
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