My fish seem to love water changes. I sometimes have problems with them getting too interested in the intake of the water changer, but I've learned that they don't get sucked all the way up so they seem to use it as some kind of toy to play with. They get inside and then swim against the current of water being sucked in.
The only time the fish aren't happy is when I start poking around the tank with the water changer, especially as the water level gets low. They'll be in one spot, and all of a sudden, here comes this big plastic thing directly towards them. They'll usually swim away from that!
But when I start adding the new water, they go nuts! They come from all over the tank to play in the current of the fresh water. I used to worry about the chlorine and chloramine in that water (Prime is in the tank, but it has to take a second to work), but none of the fish or inverts have seemed bothered by it. They often swim right into the water changer itself! I did a 60% water change on my 75g this morning, and the otos came running as if it was a convention! LOL!
I have also noticed that large water changes will trigger my Pelvicachromis to spawn, especially if it's been awhile since I've done a water change. Sometimes I'll do that on purpose. I'll wait 2-3 weeks and then do a 70% water change. Sure enough, within days, they've laid eggs.
Vicki Rena Filstar pimp #142 (four XP4s/three XP2s/one XP1) Eheim pimp #301 (Pro II 2128) Victor pimp #27 (VTS-253B-320)
90g - Journal
Pelvicachromis taeniatus 'Moliwe'
75g - Journal
Pelvicachromis pulcher 'Lagos Red' Better Pics 8-24
29g - Journal
Pelvicachromis pulcher 'unknown' --
29g - Pelvicachromis taeniatus 'Moliwe'
5g - RCS colony
2.5g - Journal