help with macro alage

kau_cinta_ku

New member
ok i have a 46bow with a 30 gal. sump fuge, for a long time I have been tring to lower my nitrates as they won't go lower than 35ppm (salifert) so i added some chaeto to my fuge some 4 monthes ago and tried all diff. lights over top my recent one is a coralife 2x9watt fixture running opposite of main tank and still no luck with my chaeto growing. actually seems like it is shrinking. all other parameters are great along with 0 phosphates. what else can i try?
and yes there is plenty of flow also
 
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