Some stores that don't offer refund or returns may do this to keep the customer coming and getting more fish but any smart business person will be truthfull
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the tiger lotus as well as n duebyana are great red plants. There also is the grren one.
Bulb plants should be planted @ a 45 deg angle and only 1/3 in the substrate
it depends on the temp of the yeast and sugar solution and amount of sugar compared to the alchohol byproduct , on how manyy bubbles a second you will get.
For small tanks this works adequatly for larger tanks you have to get a regulator and tank