my brothers tank lost 5-6 gallons due to evaporation and refuses to put more water in because "it will ruin the cycle" ok dude, enjoy that perfect cycle when you have 20 gallons in your 55 gallon tank :\
first, try starting a new thread rather than posting something totally unrelated in someone elses thread.
next, when water evaporates, that is ALL that evaporates. none of the chemicals, ammonia, or anything else evaporate (at least not right away). so all those bad things that your using to cycle, like ammonia, nitrites, nitrates, etc. are being concentrated as the water evaporates. just top off the tank. it wont hurt the cycle in the least.
