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The total hardness, or generald hardness, shows the calcium and magnesium salts dissolved in the water. There is no general advice for an optimum value. Most species like medium hard water (8 – 12 \u00b0dGH). East African ornamental fish, however, live in hard water with about 15 – 30 \u00b0dGH.<\/p>\n
To reduce the hardness, we recommend AQUAVITAL BLACK PEAT<\/a> or AQUAVITAL GRANU-PEAT<\/a>. To increase the hardness, place stone or gravel containing calcium (e. g. coral sand or marble stone) in the water.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section bb_built=“1″ _builder_version=“3.12.2″ custom_padding=“0px|0px|60px|0px“ global_module=“53385″ prev_background_color=“#000000″][et_pb_row global_parent=“53385″ _builder_version=“3.0.47″ background_size=“initial“ background_position=“top_left“ background_repeat=“repeat“][et_pb_column type=“3_4″][et_pb_text global_parent=“53385″ _builder_version=“3.12.2″]<\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=“1_4″][et_pb_button global_parent=“53385″ button_url=“\/en\/contact“ button_text=“Contact“ _builder_version=“3.12.2″ custom_button=“on“ button_text_color=“#ff1919″ button_use_icon=“off“ box_shadow_style=“preset1″ box_shadow_color=“rgba(255,25,25,0.3)“ url_new_window=“on“ \/][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" <div class=“et_pb_module et_pb_dmb_breadcrumbs_1 et_pb_dmb_breadcrumbs“ style=“visibility: hidden;“> <ol> <li><a href=“https:\/\/www.aquarium-munster.com“>Startseite<\/a><\/li> <\/ol> <\/div> Ask us what fish like about us!<\/h1>\n