TDS Surrey
Hi,
I used tap water for about 3 months here in Surrey for my tanks FOWL and then switched to reef type tank had my water checked and the TDS was 70PPm so bought a filter and only got it down to 25..so used my wifes under the sink filter and it was .03PPm..so now that is what I used.
While I was changing water over I lost a few fish and corals.
Jim
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