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1640 Views 9 Replies 5 Participants Last post by  Left C
Some of the multi-vitamins have most of the macronutrients that plants need so I'm thinking of trying that in one of my tank. Does those have any negative effects on fish?

Also, which ingredient is toxic to fish?
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Are you just curious? I would think they are much more expensive than dry fertilizers. How would you know if they were in the form your plants could use?
I would guess that it depends on what else is in them and at what quantities. You know the regular ferts in moderation are ok. CRS are a little more sensitive, though.
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