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So answer the direct question if you have done the test as you claim. Over what range of NO3 is this true ...independent of other factors? You have a reference, the tank that is breeding the otto's, simply add the KNO3 and test to see. It will not say if you have true independence, however, if...

This tank runs NO3 limited pretty fast, I need to dose about 20ppm a week in addition to feeding it heavily. Non cO2, but the plants have access to the air above. If you run the non CO2 method correctly, it should have higher PO4 and Fe etc, and low/limiting NO3. Most soil based tanks end up...

So have you actually tested your hypothesis, eg, have you aded 40ppm of NO3 as KNO3 to this tank and measured brood production? This is much easier with shrimp due to their prolific brood production and rapid generational time. Are you are making an untested assumption and likely unwilling to...

You mean high grade CRS or fire reds? These all came out of a tank that was dosed 45ppm NO3 per week and was well feed on top of that adding to the N loading per week. Red whiptails I've breed continuously for the last year. I can not stop these things, they bred like roaches. Plenty of the...

Play nice kids. It's off topic not to. Many assume that pH change is detrimental, which may be true in systems lacking algae/plants....... But in natural systems, pH can change 2 full units in marine systems(can you think of some??) and up to 4 full units, 6 up to a pH of 10 in freshwater, but...

+1

Does not matter since the CO2 is good throughout the day cycle only, night does not matter. Plants, algae etc do not use it it at night, well....a few CAM species, but they are rare and few keep them. Most everyone does not add CO2 at night to maintain pH. This is an old myth that pH is really...

Use the modeling graphing calculator to see where the errors might be. This offers a lot more predicative utility than testing in most cases and expectations. With good calibrated test kits, you can also verify the model and adjust to suit your needs, but....testing is not required usign a test...

50% is just simply a convenient example, you can modify it, say do 80%, weekly water changes, or say 30%, but the possible error will go up with less %/less frequency, and down with more frequency and larger % water change. 50% is just an arbitrary example, there's no "have to do 50%" about it...

Would it stress you out if you had say 800 calories per day, then suddenly say 3000? Then 800, then 500, then 4000? Same sort of thing. Plants largest enzyme by total mass is Rubisco(the planet's for that matter), the amount is strongly regulated by CO2 concentration. If the CO2 is moving all...

Before ANYONE suggest any changes, 1st is there anything wrong with the tank? Second, have you calibrated the test kit to ensure it is actually reading accurate over the desired range? NO3 test kits are simply put, terrible and all over the plant. Unless you calibrate them with a KNOWN standard...

Yep

This is NOT for the plants, the O2 concentration would have to be extremely low, e a 100% lethal level for virtually any fish before the plants are limited in any way in terms of respiration. Plants just do not need much O2 in other words to carry on respiration.

With canister filters, the CO2 stays higher than say with a wet/dry sealed filter(another thread on how to correctly set one up for a planted tank) at night time. Some use a powerhead or a airstone at night to help add O2 for the fish, this does not help the plants however(got nothing to do/help...

Low O2 does NOT cause algae.

Well the roots hanging down give a nice look, the behemoth's roots are over 1 ft long.

It's the same owner as the behemoth's but at the office, not at home.

Well after 14 pages.......bout time

Hell frozen over. Not the best pics, I was working and did not have time for a decent photo shoot. Tank looks immensely better/improved, the owner' has taken more effort and thought into both keeping it up and the long term design. You cannot see the roots from the aunbias well in these...

Hell really frozen over: Yes, that is a real skull Foreground is C parva. Lots of intense fast swimming fish, yes, the P zebra will be removed. Not my idea:cool: The R side is getting over grown and they put in that dang Spadderdock, which needs removed. Light is a bit higher and the...