Fert tabs work, but are not as effective as water column dosing. And if you accidentaly stir one up, you could end up with a greenwater bloom. They also make the plant work harder by having to draw up the nutrients through the roots and sending them throughout the plant vs just absorbing them where they are needed. Be sure to stay away from any that contain NH4 (urea) as this is an algae's fantasy substance. For your tank Tropica's mastergrow is perfect although more costly in the long run than gregwatson. Either would be fine as you won't need much.
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