Algaecides
Common ingredients to almost all commercial algaecides are either copper
or simazine both are toxic to fish and higher plant life.The dosage needed to kill
algae without harming fish or higher plants is hard if not impossible to determine.
Dying algae may releas toxins into the water or its decomposition may deplete oxygen
from the water and cause an amonia spike.
Water clearing agents
Flocculents should not be used in tanks with fish.Flocculents are positively
charged compounds that bind negatively charged particules so they bind together
and fall out of solution resulting in clearing.Since algae cells are negatively
charged Flocculents will clear green water.
Theres a possible problem tho,the gill surfaces of fish also carry a negative
charge.The Flocculentscan bind the gill filaments together destroying the gill
structure.-Anne