JBL PROFLORA Ferropol Refill Pack 500+125ml
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A comprehensive answer to this question cannot be provided, as this would require a comprehensive analysis of the water, the fertilisation, lighting and the carbon dioxide supply, plus regular water care. _x000D_ _x000D_ Although algae can be attributed to an excess of nutrients - particularly phosphate and nitrate in this case, - in many cases, they are also the result of a lack of so-called micronutrients, of which iron is the best known. Very often, this is the deeper cause of the algae problem. _x000D_ _x000D_ When algae growth occurs, it is generally highly advisable to increase the amount and frequency of water changes, make sure there is a sufficient supply of fast-growing plants and fertilise these with JBL Ferropol or JBL Ferropol 24 in accordance with the instructions. _x000D_
The bottle of JBL Ferropol is not worthless. Please shake the bottle prior to using the fertilizer and apply it the same way you did in the past. _x000D_ _x000D_ Our fertilizer has a relatively high concentration, so that individual nutrient salts may form crystals in exceptional cases. As soon as they are in the tank water, they dissolve again and are then as effective as before. The chelated fertilizer components are not affected by this._x000D_
The colouring of Ferropol depends on the pH value. During production Ferropol is set to a pH of 4.5. Then the colour is olive green. During longer storage and especially when the bottle has been opened, oxygen from the air gradually penetrates the fertiliser, the pH rises and changes the colour towards a brown tone. _x000D_ _x000D_ This has no influence on the effectiveness of the fertiliser and its ingredients. You can safely continue to use it.
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