What modulates our Sun? The majority of science work on the principle that the Sun is self modulating and each solar cycle is a product of a random number generator. There are others that suspect the Sun is modulated by the planets with a special emphasis on Uranus & Neptune. Thanks to Carl Smith who has recently left us we have new knowledge that significantly adds to Jose, Landscheidt & Charvàtovà's work.

Geoff Sharp

Potassium Nitrate KNO3 Aquarium Grade for EI Dosing 500g (Australia Only).

KNO3 500g - $20.00

Delivery via Courier - $25 Capital Cities (I can advise delivery costs to other zones...1 kilo usually has the same delivery cost)

Contact me at with qty and delivery address  (post code) for a quote. All transactions via PayPal or Direct Bank Deposit.

Or Pay Via PayPal and I can advise if there are extra delivery charges.

500g aquarium grade Potassium Nitrate KNO3. Highest quality imported KNO3 with no impurities that can melt your plants. Beware of 99% purity products from other vendors, the 1% can severely affect your plants with melting due to cell wall destruction, growing tip die off and highly reduced growth. (personal experience).


My High Tech aquarium (as pictured) came to life once I found the correct KNO3 without impurities, which when dosed with KH2P04 and Chelated Micro-nutrients via the Tom Barr EI dosing regime gives incredible results.


My regime for a 300L aquarium:


Mon-Wed-Fri: 3/4 tsp KNO3, 3/16 tsp KH2P04 (Macros)

Tue-Thur-Sat:  1/4 tsp Chelated Micro-nutrient (Micros)

Sun: Rest day.


Note: tsp = teaspoon.


Mon: 50% water change (important). All nutrients added directly to aquarium in powder form without pre dissolving.


Lighting: DIY LED (same spectrum as T5 HO tubes) for 9 hours per day on timer (zero algae).


Pressurized C02: 9 hours per day on timer coming on 2 hours before lights (25-30ppm).


It is important to follow the full regime to get the best results, you cannot miss any of the detai (all macros and micros must be applied). It took me 2 years to find the right products and dosing schedule but the transformation is AMAZING. (you can dose a weeks worth of nutrients in one go if you are going away, but this is not a recommended full time method, or alternatively build two dosing pumps that can last for many weeks)


To grow the more difficult, beautiful aquarium plants high light (2-3 watts per gallon T5 HO or LED equivalent), CO2 at 30ppm and sufficient added nutrient is required.


KH2P04 and Chelated Micro-nutrients  is also available from my eBay store (Ebay does not allow sales of KNO3)

A full kit of all nutrients is also available. The kit includes:

500g KNO3 (larger white granules)

125g KH2PO4 (fine white powder)

170g Rexolin APN Chelated Micro-nutrient (fine orange powder)

Nutrient quantities are roughly proportional as per my dosing regime.

Complete kit is $60 plus $25 courier charge to capital cities. Email me at for a quote. (local pickup available from Narre Warren South, Melbourne)

Note: Some remote regions may incur extra courier charges, I will quote an extra charge before shipping if applicable. I use a courier service that complies with the Dangerous Goods Act. It is illegal to send KNO3 via Australia Post.


Many thanks go to Carl's brother Dave for providing the Domain, Server and Software.