These things are good if you can read the instructions. I have two of these for my 20 gallon rimless tank and they keep the water level at rated for a week. I use the recommended 1L Evian bottles.
Live Freshwater Aquarium Plants: Dwarf Baby Tears, Hemianthus Callitrichoides, Java Moss In Vitro TC Cup By Greenpro
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Tetra AquaSafe tap water treatment agent, 5 l
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