I get mine from Aquamart at Paya Lebar Rd. a bit on the ex side, more than $25 per bottle. But this is the only liquid fert i found necessary so far (i also use jobe stick/ocean free balls for my crypts/waterlilies). Very powerful solution containing most of the essential macro/micronutrients. Impotent to note: DO NOT OVERDOSE if you dun want an algae outbreak. Also this way, the bottle can last you quite long, so the initial cost is not so bad.
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