Hi all, I've been having some difficulty with my 10 gallon aquarium and possible nutrient deficiencies. The tank is low-tech, dirted (50/50 potting soil and SafeTSorb, capped with sand) and has been set up since the beginning of August. Everything was growing well up until mid-November. I had been dosing 1mL ThriveS 1x/week, until I started noticing signs of a K+ deficiency, so began dosing ThriveS 2x/week and extra potassium (seachem). Also had a lot of brown algae, so put some craft mesh
over the lid to filter out some of the light, which helped.
Over the last month or so, my crypts have just been slowly melting, even leaves without clear signs of K+ deficiency. Primarily older leaves - they turn yellow and then the whole leaf falls away fairly rapidly. New growth looks...okay, sometimes a little pale (iron?). But lately I've been noticing that even these grow for a bit and then melt apart. I'm just not really sure where the issue is and how to go about fiddling with things in order to make it better, so wanted to get other people's thoughts on the matter. I've been thinking of adding more fast-growing stem plants, since the tank is pretty sparse now, and maybe some extra iron...?
Thank you for your input!
Light is a 20" finnex stingray, on 8 hours/day with a 4 hour break in between.
External filter (Eheim 2213)
Phosphate: .5ppm - 1ppm
GH: 10, KH: 5, pH: 7.4(ish), TDS: 550
* Can I guess that calcium and magnesium levels are OK through looking at the GH/KH?
2mL ThriveS 2x/week
1.75mL Seachem Flourish Potassium 3x/week
4-5 Osmocote+ root tabs that I replace every three months or so
Flora / Fauna
A bunch of crypts, blyxa, ambulia, dwarf water lily, java moss, hydrocotyle, a few sprigs of rotala
10 chili rasbora, 10-15 cherry shrimp, and some malaysian trumpet snails
Tank currently (back in December