| ID | Date | Nom | Où | Commentaires | |
|---|
| 631 | 2015-06-30 22:37:59 | Amanda Desormeaux | Gainesville, Fl | Really, REALLY enjoyed the section on ion exchange... very well explained | |
| 630 | 2015-03-31 12:37:15 | Jean-Christophe Ades | France | Bonjour, je suis tomb | |
| 629 | 2015-02-17 21:16:22 | Beth Levin | New York/US | | |
| 628 | 2015-01-26 18:44:43 | Marianne du Toit | Johannesburg, South Africa | Love your sense of humour! | |
| 626 | 2014-09-28 19:32:32 | Jean Fran | Vienne 38200 France | Je vous envoie une tr | |
| 625 | 2014-08-15 15:57:39 | Brian Wilhite | P.O. Box 272226 Tampa, FL 33688 USA | My background, Chemist involved in organic synthesis, polymer chemistry, desalination and membrane technology with engineering. Still maintain my Florida drinking water operators license issued thru Florida Dept. of Environmental Protection, level "A" #0013642.
Great site my man, worth every minute spent here. Lots of great info!! | |
| 624 | 2014-07-01 06:52:50 | Ramlan | | very informative..thank you | |
| 623 | 2014-05-15 06:59:47 | Mohammad | Calgary/Canada | Very pleasant website! I fill I am in my grandpa home and sneaking different rooms! | |
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