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  1. The THINK Tank
    Which colors of light found in the PAR spectrum best support zooxanthellae? In what ratios? The purpose of this thread is to host a discussion in which we will share knowledge about zooxanthellae and the conditions best for its growth and development (with an emphasis on PUR). For a...
  2. General Reef Discussion
    I was shopping at Wall Mart and happened to walk past this water filter today called a ZeroWater filter. Anyways it claimed to produce zero TDS water and the filter included a HDM brand TDS digital meter. Not having a RODI unit i bought it for $35. My old Pur water filter actually raised my tap...
  3. General Reef Discussion
    Anyone ever used a PUR meter or know where to get one?