Secondary Structure. This is where the secondary structure comes in. The secondary structure is a repetitive 3-D structure of a protein. These are things that people often come into contact with when they're looking at protein structures.
If your fish are more heat tolerant, try increasing the temperature to 32 C/89.5 F for the first 3-4 days to kill the Ich. Then reduce temperature slowly to 30 C/86 F, and hold it there for an additional 6-7 days, or until a total of 10 days have passed.
In general, mortar must set at least 24 to 48 hours before grouting. Apply mortar when the ambient air temperature is between 50 and 100 degrees Fahrenheit. Ideally, temperatures should not exceed this range for at least 72 hours after application.