Green water, cloudy water, floating particles and/or unpleasant odours:

PRINTER FRIENDLY VERSION

What has happened?

Single-celled algae, also called "micro algae", reproduce explosively in temperatures above 15C (an algae bloom) and colour the water green.

What can happen?

Underwater plants die due to lack of light. Fish can suffocate due to lack of oxygen (although algae produce superflous amounts of oxygen during the day, they use all this up during the night).

What can be done?

Add Crystal Clear Instant Clarifier:

1. The carbonic hardness must be tested (included in the OASE-aqua-activ "Test Set"). If this is below 5dKH, lime must be added to the water with "Hardness Plus" from OASE .
2. Test the pH-value. If the pH-value lies above 8.6 or below 7.5 also add "Hardness Plus".
3. Only after step 1 and 2 have been completed add Crystal Clear Instant Clarifier according to the instructions. The pond will recover in the space of 6 hours. Unpleasant odours (if any) will disappear. Plants will breathe again.

Will the pond stay clear?

Only if something gets done about the cause of the algae bloom. For example fish might need less food, dead leaves should be removed, silt can be consumed with micro-organisms ("Sludge Minus"), real underwater plants as well as floating plants should be planted in the pond.

Tip: If you want to check the effect of Crystal Clear, simply take a jar full of green pond water, add 1 to 2 drops of Instant Clarifier and watch the water become clear after just 1 minute. Of course, this only works if the water contains enough carbonic hardness ("Hardness Plus")