Up until the time the (previous post) photos were taken my dosing was 15ml of Tropica Premium Nutrition for micros and Macros dosed at EI levels ([email protected]
and [email protected]
). For whatever reason I wasn't able to dose more than 2ml of Tropica a day without the shrimp acting irritated and sometimes dying. As you can see from the photos above, everything looked pretty bad. Lots of paleness, stunted tips, and poor growth rates. That dosing regimen just wasn't cutting it.
So between that time and now, which is about two weeks, I changed my fertilizer game! Reading some of the DIY custom micro mix threads I decided it was time to roll my own. Heres what I came up with. Its pretty similar to Burr740's mix if not almost the same.
Macros were dosed at water change only while Fe and micros were dosed each day.
Here are the results after two weeks.
Rotala Macranda 'green' is incredibly pale at the tips. Also has twisting of the leaves. The Myrio mini also showing stunted tips with slight melting at the top.
Rotala Indica 'green' showing similar symptoms as Rotala Macranda but without the pale color.
Aside from the plant issues, BBA has spread to other parts of the tank, and BGA has started spreading along the substrate in the front and back of the tank.
Whatever I'm doing is just not working out.
So today I decided to dedicate the better half of my evening to tank maintenance. I gave the sump and plumbing a good cleaning, got rid of all the dying and algae infested leaves, And thinned out some of the plants. I also did a massive 42 gallon water change to reset tank parameters.
While doing such a large water change, I realized my setup doesn't hold as much water as I thought. I always assumed it was around 55 gallons including the sump. I was off by almost 10 gallons. In reality it holds around 47 gallons, tops.
I've always been adjusting fertilizer calculations according to 55 gallons of tank water. I was dosing 7ppm of PO4 instead of 6ppm.
Im thinking maybe plants are showing deficiency because all that PO4 is binding to stuff in the tank, rendering nutrients unavailable to plants? Maybe I should cut down my PO4 dosing...
Time to make a new batch of ferts
... with the following amounts:
Macros are dosed all at once during water change. Micros and Fe are dosed everyday of the week.
Tank water degassed is at around 6.9ph. CO2 turns on two hours before the lights do. By the time the lights turn on, the pH has dropped down to around 5.8. So I'll assume that I don't have a CO2 problem.
GH is at 5 degrees. KH is whatever I get from the .6g of Seachem Alk Buffer I add to the 30 gallons of ro/di water I change out once a week.
I will keep with this fert regimen for the next two weeks and see if things start to improve.