I have a 10 gallon mid-tech tank (my first planted tank) that did very well for the first 6 weeks or so but then plant growth slowed to a near halt almost overnight and I developed an algae problem that has been worsening. I think the problem is that I the root tabs I started with have run out of macro nutrients, but I am not sure.
Here is some info on my tank:
10 Gallon 20"L x 10"W x 12"H
Lighting: Marineland double bright LED (about 25-30 PAR at substrate level, but uneven)
- Flourish root tabs
- Flourish comprehensive (1ml 2x per week)
- Flourish Excel (1 ml daily)
- Taiwan Moss
- 1 medium Anubius coffeefolia
- 1 Aponogeton ulvaceus (frequently pruned when growing)
- Multiple Zosterifolia heteranthera (frequently pruned when growing)
- Hygrophila corymbosa angustifolia (frequently pruned when growing)
Nitrate: Barely readable amount, probably less than 2 ppm
KH and GH: I'll need to re-test to get the exact number but my local water is quite hard
Algae that have appeared:
Green hair algae (or green thread, I'm not sure I can tell the difference)
Diatoms (only on anubius and one rock)
Green/yellowish soft algae on glass
I cut my photo cycle from about 10 hours per day down to about 6 to try to slow the algae growth.
The only thing I can think of that may have changed is the root tabs' supply of NPK being exhausted. Does that sound like a likely reason? Does anything else stand out as a likely cause of the problems?
I will admit that I mistakenly thought Flourish comprehensive provided macros until recently. I am getting some new Flourish root tabs today, but I'm looking for a better way to dose macros since the tabs are expensive and hard to monitor. With the setup I described, would osmocote+ tabs or water water column dosing with KNO3 and K2HPO4 be a better option for providing macros?
I like the idea of trying EI dosing or similar, but I am doubtful that my excel rather than CO2 injection will be up to meeting the demands that would impose. Could I do EI dosing with my setup?