Te svježe bočne grane mogu se upotrijebiti za ispitivanje toksičnosti klasastog krocnja u sustavu bez sedimenta.
OECD (2000), ”Guidance Document on Aquatic Toxicity Testing of Difficult Substances and Mixtures”, OECD Environment, Health and Safety Publications (EHS), Series on Testing and Assessment, nr 23, OECD Publishing, Paris.