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There is generally a choice of oxygenators available from the following selection;
Callitriche
Ceratophyllum demersum- hornwort
Hippuris vulgaris
Myriophyllum spicatum
Ranunculus aquatilis
Lagarosiphon major -aka Elodea crispa
Elodea canadensis
Potomageton crispus
but perhaps only two or three choices at any one time, supply is erratic as there is strong demand.
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