Boosting nitrates...how?

[schoeplein]

So, my tank has been up for almost three months (maybe longer, time flies), and nitrates are always zero. Even if I feed a bunch. Plants all look "fine", but I'm guessing they could use some more nitrates.

I dose the following:
Glut 0.5mL/ga/day
Flourish 1mL/ga/every couple days
Phosphorus 1mL/ga/three-four days
Potassium 1mL/ga/week
Iron 1mL/ga/week

None of these contain nitrogenous molecules.

Temperature 79°F
pH 7.8
Ammonia 0ppm
Nitrite 0ppm
Nitrate 0ppm
GH 14-15
KH 14-15

Plants:
Ludwigia repens (back left)
Reinecki something (back left, middle)
A fast growing stem with salmon colored leaves at the top (back right)
Slow growing stem with skinny leaves, bright green, bright pink at top (fat left)
Onion bulb plant (back left)
Short red lily (far right, mid)
Staurogyne repens (front, left)
Cardinalis something (front, right)
Ferns (not sure the type, moved onto driftwood, on floor in pic)
Echinodorus Atlansberg (back left)
Two small crypts, and an undulata that's growing like crazy under the shade of my large amazon sword (back middle).

Fish:
7 dwarf gourami
18 neon tetra
20'ish various danios
4 gbr's
7 platys

I think that's everything.

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[Sk3lly]

If your already dosing the seachem range then why not dose their nitrate, seeing as you already dose their other two macros.

Or make the switch to dryferts

 

[schoeplein]

Which dry fert would supply the appropriate nitrogenous molecules?

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[Sk3lly]

Potassium nitrate dosed dry or mixed in a dosing bottle with rodi water is fine

 

[Brookster123]

Or seachem nitrogen if that's your thing..

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[bud29]

I would definitely look in to dry ferts. Liquid ferts are primarily water, so you aren't getting as much fertilizer for your money as you would with dry. You can get a comprehensive dry fert combo (KNO3, K2SO4, KH2PO4, CSM+B) for around $20, and it would last you a very, very long time.

 

[aqua_chem]

The nitrate salts are much cheaper. I ran some numbers once that showed that it took only a few dimes worth of nitrate salt to make an equivalent of Seachem's nitrate booster.

Also, the nitrate salts usually have another helpful nutrient, like potassium, which tanks regularly run into issues with.

 

[schoeplein]

Where would one buy various salts?

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[aqua_chem]

This is my personal favorite.

Aquarium Plant Fertilizer | Green Leaf Aquariums