Large aquariums > 100 gallons

[eveliens]

To be honest, at one point that was my "plan." Get one big one and tear down the little ones. It didn't work. Now I have a big one and little ones (although not the necessarily the ones I started with). However, if all of your fish are compatible, I don't see why not.

If I had to choose between the tanks you listed, I would get the 150 and keep a 20L.

 

[12 Volt Man]

I usually change 20-35% every week. In between hauling buckets of water outside, I waste a lot of time picking snails out of the tank, removing frogbit that's starting to yellow and replacing plants that my crayfish has uprooted. He very ungracefully walks over the top of them or pushes them out of his way.

It also takes about 1/2 and hour a couple of times a week to test the water in all the tanks and add supplements for my plants and snails. I try to test the water twice a week because I have occassional nitrite spikes, which I assume is due to the tanks being overstocked.

okay a couple of observations:

1. look into getting some snail eating fish - that will take care of the snail problem.

2. if you are having doing regular water changes but still having nitrite issues it is likely due to overfeeding...unless you are WAY overstocked. what kind of stocking are we talking here? is the water cloudy all the time? are you feeding once per day? if you are feeding more than that, its generally too much.

3. think about removing the frogbit or at least just having it in one of the small tanks.

4. once your tanks get stable, you really don't need to do any testing at all. most aquarists generally test nitrAtes only if they have a reason too (eg a dead fish etc). After a while, the tanks tend to stay constant if you are doing the constant maintaince - hence, no real reason to test all the time. once your nitrIte and ammonia levels get down to zero and stay that way for a while, you really never need to test them unless you suspect a spike - which usually shows up as cloudy water all of a sudden.

5. find a new home for the crayfish if you can. they eat plants, fish, everything.

hope this is of some help