Sorry for the random questions, but I gotta know:
Background: I have 4 nano tanks. A 3 gallon with just a small mystery snail. Another 3 gal with just a male betta. A 5 gal with a male betta and two mystery snails, and a 10 gal with a male betta and two otos. All four tanks are planted and well cycled.
Random question 1: All four tanks water test with 0 ammonia, 0 nitrites and 0 nitrates using API master kit. I do weekly water changes At 30-40%. The 5 gal with the betta and 2 snails gets extra poopy since the snails are large, so I probably do more of a 50% water change as I gravel vac thoroughly. Aren’t I supposed to have some nitrates? Should I skip a week of water changes? Or are all zeros Nirvana?
Random question 2: The plants in my 10 gal with 1 betta and 2 otos are loaded with green algae (thick like tennis ball fuzz). Do the otos not like it? Thought they’d make quick work of it but maybe I’m being impatient. They’ve only been in there for a week. The plants are vals, java’s, anubias, swords. Seriyu stones are getting coated too. Nicrew light is on for 6 hrs tho not on a timer. Do I need to supplement the otos with some algae wafers or blanched zucchini? They seem healthy, happy and have full bellies.
Random question 3: In the 5 gal betta tank with two snails, the snails always seem to be “gettin it on”. The larger snail will completely engulf the smaller one. There’s been no eggs. I don’t want babies and keep the water level up. Just curious if this behavior is actual mating or something else. I’ve had the snails for about a year.
Random question 4: In the 3 gals I am using the tanks’ built in filter that utilizes cartridges. Both are Marineland contours. I want to stop changing the cartridges because isn’t that stuff gold? I’d like to just swish them in tank water to de-gunk them. Does anyone else do this and re-use the “seasoned” cartridges? I’m assuming they’re gonna have to be swapped out at some point but what do you think is the max life span? The cartridges are the small z size.
Appreciate any and all comments.