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Medications That Damage The Bio Filter
By Jim E. Quarles
22-04-99

Herewith is a table of chemicals and their effect on nitrifying bacteria. I hope it proves useful to some of you who have doubts on this subject.

Chemical

Effect

9 Iminoacridine hyrochloride monohydrate

Toxic

Acriflavin

Toxic

Aldehydes.

Toxic

Ampicillin.

Safe

Benzaldehyde Green. Toxic

Toxic

Benzyl Dodecyl. ( Ammonium Chloride.)

Safe

Chelated Copper.

Safe at low levels. *

Copper sulfate.

Safe at low levels. *

Erythromycin.

Safe at low levels. **

Formaldehyde.

Toxic

Gentian Violet.

Toxic

Furan.

Very Toxic

Furazolidone.

Very Toxic

Formalin.

Toxic

Hexamethyl Para Rosaniline.

Toxic

Isoniazid.

Toxic

Kanamycine.

Toxic

Malachite Green.

Toxic

Malachite oxalate.

Toxic

Nethyl Blue.

Toxic

Naladixic Acid.

Toxic

Neomycin Sulfate.

Toxic

Neutroflavine.

Toxic

Neomycin sulfate.

Toxic

Neutroflavine.

Toxic

Nifurpirinol.

Toxic

Nitrofurazone.

Toxic

Oxytetracyn.

Toxic

Penicillin.

Safe

Piperazine citrate.

Safe

Potassium Dichromate.

Toxic

Quinine Hydrochlorid.

Safe

Silver Colloid.

Toxic

Sodium Formaldehyed Bisulite.

Toxic

Sodium Lauryl Sulfate.

Toxic

Stabilized Chlorine oxides.

Toxic

Sodium Thiosulfate.

Safe

Sulfacetamide.

Toxic

Sulfadiazine.

Toxic

Sulfamerazie.

Toxic

Sulfas.

Toxic

Sulfathiazole.

Toxic

Tetracycline.

Safe at low Levels

Victoria Green B.

Toxic


* Safe if kept at minimum therapeutic level ( .15 to .25 ppm for copper salfate, somewhat higher for chleated copper depending on type.

** Not at normal therapeutic levels. Can be used at low levels. Erythromycin, can be safely used at 1 ppm for Cyanobacteria ( Red and Hair Algae ) control.

Acknowledgment:

The late Edward Cassidy.

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