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Re: PMDD/test kit/pond snails/A. gracilis

> Date: Mon, 12 Jan 1998 06:39:16 -0500 (EST)
> From: ac554 at freenet_carleton.ca (David Whittaker)
> Subject: Re: PMDD/test kit/pond snails/A. gracilis
> Hello folks,
> I have a few questions which some of you might care to answer.
> The first concerns a batch of PMDD which I recently concocted.
> In 300 ml of distilled water were sequentially dissolved
> approximately
> 1.5 tsp micronutrient mix
> 1.5 tsp MgSO4:5H2O
> 1.5 tsp KNO3
> 2.0 tsp K2SO4
> 2.0 tsp CaCl2
> 0.5 ml muriatic acid
> Usually all goes well and the solutes dissolve properly.
> However, this time I changed the mix to include the calcium
> chloride as listed above. A white precipitate was formed which
> occupied 1/4 of the volume. A day in the refrigerator has
> subsequently increased the amount to about 3/4 of the volume
> of the jar. Would anyone care to explain the chemistry to me?
> What is the precipitate and will it dissolve on its own in
> the tank in less saturated circumstances?

Hey It finally dawned on me. The purpose of the .5 ml muriatic acid in the
PMDD formulia is to keep the "food" from spoiling. Why are you keeping it in
the fridge??

Best to you..........

Ric Cooney, N3BRB
Aquatic Gardeners Association

Maryland is for Crabbs....................I'm doing my share!