Oxygen levels under normal saturation levels in an aquarium will not effect pearling significantly. Adding more CO2 to the point of non-limiting levels means that plants will uptake the C and give off O2; this is where pearling comes from. So if anything, higher CO2 should mean more pearling presuming other nutrients are non-limiting and light levels are high enough to induce it.
Because pearling, when all other variables are correct, is driven by light, this means that pearling is not a strict indicator of plant health. You can have light low enough to avoid pearling, but still have healthy plants. It is also not an indicator that conditions are currently correct in the tank, just that the plants are healthy. You can put healthy plants in some fairly poor conditions yet still get pearling because of their stored nutrients.
they were perlling in the initial set up for a week or so about 6 month ago, all other levels are finen usinlg lamotte colormeter, ....
plants still growing, but i do get some algae here and there not to much....i was tring to figer out why i cant get them to pearl.
one more thing, the ph is 7 in the morning goes down to 5.9 by noon, if i go down to 5.7, fish will start to have difficulty, and i always turn co2 of if am adding new fish for a day then let it drift back down the next day.
That is a lot of light; your light is about 3.8 watts per gallon, light really does drive the process.
Seems as though your CO2 is up.
Could you humor me and tell us your EI dosing?
What do you mean dosing EI 4 days a week? Do you dose macronutrients and micronutrients together? How often are you doing water changes?
What kind of substrate to you have?
Is this an ongoing problem!
I tend to agree with Philosophos, him being so dad-gummed smart and all, if you just started EI dosing, just give it time.
Many times we get plants from good sources they have a stockpile of nutrients, I have found folks can get away with low or very lean nutrients for about 12 weeks, sometimes longer, especially if they have a rich substrate. Sooner or later though the plants need a little help with the nutrients.
I does 2 days kno3 /k/po4 and 2 days plantex, then i dont do es anything the rest of the week(3days), i used to does 6 days as per EI, in the first feww months then i started to cut down after i added the fish. if i keep doesing the same way i will get high level of po4/kno3 like po4 will pe up to 3 and NO3 WILL BE UP TO 30-40 or so, i noteced no diffrence if i keep dosing full 6 days.
i did chrats in the begning to see were my uptake is....it changed after few weeks things slowed down, plants still healthy.
i invested alot of time and money for the fun of it...kits , callipration soultions from lamotte/hach , colormeter, pipeter....etc
I am someone who has invested a bunch in sophisticated test equipment so I know how much fun it can be.
What I am going to suggest to you is to ignore your test equipment for a while.
Here is my suggestion to you.
Into 50 milliliters of distilled water, dissolve:
• 4 grams of KNO3
• 1 gram of K2SO4
• O.25 grams KH2PO4
• Add enough distilled water to make 90 milliliters of solution mark it “Macros”
• Dose 30 milliliters on water change day, third day and sixth day
Into 50 milliliters of distilled water mix:
• 1.3 grams of CSM+B
• Add enough distilled water to make 90 milliliters of solution mark it “Trace”
• Dose 30 milliliters the day after water change day, fourth and seventh day
• On water change day, dose 2 grams Barr’s GH Booster.
This for your lighting arrangement, is a bit lean (by my standards it is very lean). Keep the CO2 up make sure everything is clean.
Try this for three weeks or so and see what your plants and critters tell us.
If you have been doing this for more than three weeks and given the low Nitrates you reported, you need to increase the dosing by a quarter or a third. Then after a bit you may need to raise them again.
As I said before, light really does drive the process, the demand for CO2, macro and micronutrients, even filtration.
Make sure your filters are clean, keep the CO2 up.
Also remember nitrates even at 50 or 60 ppm are not likely to harm your critters, I have seen some shrimp with problems over 60 ppm.
My best guess is that when you reduced your dosing, it was probably what you needed given your lighting.
Also remember that plants take a bit of time to adjust to new situations, lighting, dosing routines, CO2 and so forth.