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  1. idris

    Hardness & algae

    Ovwr the last few months I've had a lot more algae than I used to get. I know there are various factors I can look at but I'm trying to consider what has changed. A significant difference is that I've moved from tap water to rain water. Our tap water is off-the-test-chart hard. Literally...
  2. idris

    Rainwater confussion

    Our tap water is off-the-test-chart hard. Literally. GH>180 and KH >240 with a pH around 7.2 Our rain water is GH<40 and KH<30 with a pH of 6.3 I've never bothered with rainwater before and have no species related preference (fauna or flora), but was wondering about using rainwater in my low...
  3. idris

    Mains water works

    i recently had a catastrophic tank crash which may have been attributable to works done on a water main a couple of roads away. (This has been discussed at length on another thread.) I was planning to do a water change the other day an noticed there were more (unrelated) works on a water main...
  4. idris

    Decreasing pH and hardness

    I'm vaguely thinking about trying to reduce the pH and hardness of water in my tank so I can keep fish that prefer softer, more acidic water. It's a while since I read up on this sort of thing, but from what I remember I could use peat to simultaneously reduce pH and hardness. I think my best...
  5. idris

    Toxins in pipes (Q for the chemists)

    Is it conceivable that a piece of standard, uncontaminated, garden hose could leach toxic chemicals into water passing very briefly through it. And if so, what might those toxins be?
  6. idris

    Nitrates, tap water and plant aborbtion

    If adding tap water with relatively high nitrate levels when doing water changes, how quickly will they be taken up by plants? What are the effects on fish during such nitrate spikes? How do these spikes compare with those resulting from adding ferts? Should you consider some way of reducing...
  7. idris

    Confused about pH and GH

    1st point for confusion: There seem to be a lot of references to Alkalinity (as measured by KH test kits) as if it something entirely different to Acidity and pH. From what I remember of A-Level chemistry (albeit 20 years ago), Alkalinity and Acidity are just the opposite ends of the pH scale...
  8. idris

    Which addatives?

    I was about to order some dechlorinator online but was confronted with a gazillion different brands all claiming slightly different things: removal of chlorine and chloramines (both of which I know are needed), "instantly detoxifies ammonia" (I don't think "detoxifies" is a real word, but never...
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