[Pavel Chaloupka]

Add the cultivation sulution with fertilizer so that algae can reproduce again. If you want very high quality algae, let it sediment or filter it and dilute the cultivation solution in like 1:10 ratio with tap water (if you have very low NO3 content) or better RO water . Algae will not have nutrients and will not multiply but it will produce storage substances which will make it much more valuable. 3 days like this should be enough. Than use it for feeding Moina.