Understanding Phosphorus in Aquascape
Ideally phosphorus should be kept in the range of 0.1 to 1mg/L. It should never be allowed to fall below 0.1mg/L but it is acceptable to be more than 1mg/L as long as the plants are healthy and no algae can be seen. To prevent algae from growing in a high phosphorus concentrated water, nitrogen needs to be in the correct ratio. For instance, if your phosphorus has accumulated to 1.5mg/L, your nitrogen should be somewhere around 15 to 30mg/L. This will allow the plants to grow fast enough to combat the algae. As long as you have proper lighting and the right CO2 concentration, your plants should be able to win the race against algae.
