I use some Zeo products, some Fauna Marin and lately some Brightwell. I use the zeo/ultralith rocks in a DIY reactor, the carbon sources, bacteria, amino acids and also add some potassium. Until I started with the rocks and the carbon sources I was always battling nitrates and phosphates. Now, nothing.
Colors are very bright and growth is terrific. For about $1/day for my 200 gal. it is a very good investment IMO.
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