I have been dosing EI on my recent 37 gallon scape. I am starting to suspect dosing issues.
Here are the symptoms: One week ago there were holes in hygrophila corymbosa "compact" with yellow at the edges of the holes. Similar holes found in older leaves of pogostemon stellatus without yellow edges.
My rotala macandra green recently went through some stunting of the tips and poor growth.
I am also experiencing algae of all kinds, primary problem algae is staghorn. I have thread algae in the stems. Recently been having a little more GSA than before. GDA was gone and returned with the return of the reflectors. It is difficult to tell if it is staghorn or BBA on the E. parvula.
Filtration: eheim 2217, i just added a small nano korlia to increase flow, although I thought it looked pretty good before.
CO2: pressurized through inline atomizer 3 bps maybe more. I routinely see a pH drop of around 1 throughout the lighting cycle. I know it isn't a precise way to guage CO2 but lets me know I'm putting in a fair amount. If I press it much higher my Rams go to the surface or hide.
Lighting: 2x24Watt T5HO's(one zoomed 6500k daylight and one zoomed plantgrow bulb) on an icecap 660 ballast. I have played around with the reflectors a bit. Without reflectors algae definitely dissipates, this is what helped the GDA go away.
My issue with this is that I do not get good color in my stems. Is this a dosing issue or lighting in regards to the colors? I am currently running one reflector on the bulb over the stems and took the reflector from the daylight bulb which is above the foreground and front half of the tank. This is where I had a nasty outbreak of staghorn, on rocks, and all over older growth of E. parvula, staurogyne repens, even blyxxa leaves.
Dosing routine: I increased my dosing last week to 1 tsp KNO3, 1/8 tsp KH2PO4, 1/8 CSM+B+FE DTPA (this mix is 1:3 Fe to CSM+B), I also add 1/16 tsp FE DTPA a couple times a week. I usually dose all of them at the same time. On water change day, Sunday, then Tuesday, then Thursday. Should I spread my dosing out? Break it up to daily? Or does that not matter?
I use RO water at water change and add 1 tsp GH booster as well as 3-4 tsp freshwater aquarium salt.
Steps I have taken to deal with this recent outbreak of algae: increased dosing, added koralia nano pump, I will try to up CO2 over the course of the week, decreased lighting by removing one reflector (I am concerned about growth in some species without the reflector, it is a deep tank, 20"), I put some activated carbon pad in my filter and am currently recharging purigen which I will add to the filter today.
The purigen was saturated, could that have been releasing DOC's?
Anyways, that is the situation. A lot of info, but hopefully will help some of you help me. I would really like some feedback on my dosing as I think there was or is an issue with it. Any other advice is welcome. Thank you all.