Table 1 Potential of hydrogen (pH) and chemical composition of various types of water used for hydration of larvae Polypedilum vanderplanki under laboratory conditions; tap water from “Raba intake” in Kraków; mineral water "Cisowianka".

From: Rehydration of the sleeping chironomid, Polypedilum vanderplanki Hinton, 1951 larvae from cryptobiotic state up to full physiological hydration (Diptera: Chironomidae)

Parameters

Tap water

Mineral water

pH

7.76

6.80

Oxidation from KMnO4 (mg/dm3)

0.015

0.027

Chloride (mg/dm3)

20.6

 < 5

Ammonium ion (mg/dm3)

0.05

0.06

Nitrite (mg/dm3)

 < 0.01

0.013

Nitrates (mg/dm3)

4.9

2.4

General hardness (mg/dm3)

160

430

Calcium (mg/dm3)

40.1

130.3

Magnesium (mg/dm3)

6

21.9

General iron (mg/dm3)

0.04

 < 0.02

Sulfur (mg/dm3)

30

 < 10

Aluminum (mg/dm3)

 < 0.008

 < 0.008

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