I’m probably the only one of my Norwegian paro-friends who use circulation. But I think it will be so dead and stagnant without? I keep several P. Sintang / sentang in 63L, use the smallest power head, at low strength. This pump runs a home-HMF corner filter. I may be a bit concerned that it should be, and look clean and nice. Also I think it is easy to cover with film on the surface if there is no movement? Attaching a video that shows how weak flow I have there:
P. ornaticauda I hold in my paludarium. Here I have the smallest EHEIM aqua ball in the back of the tank. Bottom area is 45×45 cm, so it’s great distance from the small waterfall to the other side of the tank for example. Stagnant water in large parts of the tub.
But in my 450 liters tank, where I keep a group of Sphaerichthys osphromenoides and selatanensis, it is quite strong water currents. But the tank is long, 150 cm, making one part pretty easy/slow moving. What is strange is that they more often choose to swim in that part of the aquarium where there is strong current (and most light ..)
I’ve had a bit guilty for not keeping these guramies in more stagnant water (and darker water), but now I have had Sphaerichthys for about 3 years in this way, and they are very strong and healthy, and playing regularly . Seems like they enjoy it very much. But it is true what Helen says. That one does not know how the eggs and fry will be affected.
I have not tried to breed any fish yet, it remains to try.
Slightly different age, a bit variable size on them
(I am very bad at writing English, have therefore used google transform for writing assistance. Hope it’s understandable)