Cloudy water - NO3 deficiency
A 30 gal. heavily planted, moderately fishy tank has been going quite cloudy.
I changed water - 50%, its fine for 24 hrs than becomes cloudy, again. Double Finally got around to testing all parameters. Ammonia, zero, NO3 below measurable with the spendy NO3 test kit, PO4 about 0.3 ppm (or is that 0.3 * 4.4?) K - 2.3ppm. Other parameters - KH - 16 deg.; GH 20, pH about 8.1 reduced to 7.3 with the DYI-CO2 system. So I added some Seachem Nitrogen - halfway between beginner dose and final dose I will need and water immediately cleared up. 2 days later its cloudy, again. More NO3 its clear. Mind, I removed all the easily accessible fish during this phase of trying to resolve the problem. Strangely, the other 30 gal. tank that now has a fish overload does not have those problems. I expect there's a DUH! in there somewhere as I don't overfeed. The question is, what is the cause of the cloudiness? PO4 - NO3 ratio imbalance, alone? Or something else I need to chase? Possible fungus or yeast (suspects of past problems)? In this tank, there is excessive "pearling" in the evening and it would appear that it is the algae pearling. Is this O2 or CO2 bubbles? Thanks for any help you can provide. |
Cloudy water - NO3 deficiency
You seem to have a green water at the beginning stage. It thrives in the a
excess of phosphates of water and high light levels (above 3wpg) of light in the newly established tank. Once the green water develops, the nitrate levels drop to zero, so the plants cannot outcompete gw and consume all the phosphates since the nitrates are limiting factor for them. Once you add nitrates, the plants can now consume the phosphates and the gw for which the phosphates are essential dies out. However you seem to have phosphates coming back later on. Do you use any non-aquatic plant fertilizer that has phosphates in it? or may be you buffering the water for phosphates? |
Cloudy water - NO3 deficiency
Tom, the CO2 is 24 - 7 DIY. Being a DIY system I was concerned that yeast might
have gotten into the system in the past, and be reflected in current conditions. I am adding K at the same time as the NO3, also adding TMG with every water change. stump remover KNO3. Are all brands equal? Is a 1/4 teaspoon of Lilly-Miller equal to a 1/4 teaspoon of brand X? The K is pretty high in the stump remover and the well water already has 2.3 ppm at the tap, which is why I'm dosing from separate sources. I'm not sure this explains the cloudy water as I have 6 tanks all treated equally and this is the only one with a significant problem. |
Cloudy water - NO3 deficiency
Anton,
Thanks for the interest. I suppose green water's possible. No, there is no source of PO4 going into that tank other than fish food. And it gets the same amount of fish food per fish as the other tanks. The well water has no N or P, only K. I did three 50% water changes in 2 days and the cloudiness came back in two days. Before I found time to test all 6 tanks for everything I put in some bacteria thinking I had an NH4 problem from cleaning the water and filter system repeatedly, and the tank cleared up. Then got cloudy in a couple days - which was when I found time to test and NH4 was zero. I have no idea what's in the solution with the bacteria that caused a temporary clearing. I also found that netting the fish out so I could concentrate on that tank without scaring them silly - the process of swishing around in the plants, knocking off algae and all the pearling of gas X on the algae temporarily cleared the tank water. I'm now adding no fish feed, so no extra PO4 source other than some dead leaves off some plants.The meremaid weed and wisteria are going through metamorphesis. I don't buffer the water - what with a KH of 16. My pH control is strictly DIY-CO2, 24-7. I'm trying to get n-p-k all in balance but not so rapidly as to kill the clean-up crew bottom dwellers I couldn't net out. |
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