i have a 38 gallon tank with one red belly piranha. i bought a rena xp1 2 weeks ago, and i have no problems with the filter.
my questions are:
1)how do you keep your water crystal clear?
2)is it normal when the water smells different?its not really a foul odor. if its not normal, what can i do to get rid of the smell?
3)i saw this eheim surface extractor at big als, will this fit my xp1? is this really useful? how do you clean surface sludge?
thanks!

my questions are:
1)how do you keep your water crystal clear?
2)is it normal when the water smells different?its not really a foul odor. if its not normal, what can i do to get rid of the smell?
3)i saw this eheim surface extractor at big als, will this fit my xp1? is this really useful? how do you clean surface sludge?
thanks!
