08-02-2010, 08:44 AM
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5ppm is nothing to be alarmed about. My tank, is planted and still shows a reading of 10ppm for nitrates.
Something that did jump out at me though:
We currently have 3 phantom barbs, 2 tiger barbs, 2 rummy nose tetras, 5 serpae tetras, 2 turquoise rainbows, 4 austrailian rainbows, 2 bosemanis, 4 dwarf gouramis, 2 alge eaters, 2 small cat fish i cant recall their species but they have black and white stripes and you never ever see them, and 1 pleco - sadly one of my pleco's passed on yesterday for some unknown reason.)
Barbs as well as tetras should be kept groups of atelast 6, they are shoaling fish and feel much more comfortable in groups, and with a 150G tank, you more than enough room to accomodate all this. I would up the numbers of the 2 sets of barbs and the 2 sets of tetras.
Sorry to hear about your pleco