I could also be from Silicates. How is the DI resin? TDS?
I would use PO4 remover (Phosoban or Phosar, etc through a reactor) and 20% w/c.
Also pick up a Sally Lightfoot crab. She ate all my HA within a day and I still have her after 1 year. She hasn't touched any corals, clams, or shrimps -- model citizen.
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"If you have more than one tank in your livingroom, you might be a reefneck"
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