
Originally Posted by
Ken Worthington
If I could add a couple of points....
Thoroughly rinsed commercial 'play-sand' is okay to use, and cheaper. (Deku, SiO2, is the main ingredient and is completely safe).
Live plants are such a good idea for a number of reasons;
Although they will absorb Oxygen and produce CO2 as they respire, they will provide Oxygen and absorb CO2 in an overall beneficial way when they have enough light to photosynthesize.
Plants will also absorb the three main Nitrogen compounds to various degrees, depending on the situation and plant-type.
Plants will provide a surface area in which beneficial bacteria can live.
Hardy plants such as Java fern, Java moss, Anubias, etc are hard to kill, and cheap.
You only need to even consider CO2 diffusers with more specialist plants.
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(@ Deku) With all due respect, but quote "It is the best because to have a cycled tank you NEED a filter." is not true! This is from a chemistry point of view....if a filter has a biological, mechanical, and chemical filtration system then it has nothing more than a well-balanced eco-system. The minus being that the vibration of a filter can stress the frogs (try putting your ear to the glass with it on, then off and hear the difference!) as is particularly noted in other aquatic frogs, such as Xenopus laevis, in captivity.
In addition, if I could mention that the number of offspring and frequency of breeding in the wild be taken into account when determining the risk of ingesting sand or things that may cause gastro-intestinal impaction. If two frogs can produce two healthy offspring that reach sexual-maturity, then in evolutionary terms, this is a success.
I'm sure more young frogs will die from predation, etc, than by impaction,but in captivity we eliminate the animals natural enemies, whether predatory or inanimate.