Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Assuming the water chemistry is suitable with respect to ammonia,nitrites,nitrates, which larger plant mass and regular maint can help control,some floating plant's have in the past greatly decreased the number's of fishes I lose from jumping.
Have lost all manner of fishes in the past, including those mentioned from jumping, and easiest remedy was to replace the glass cover's over my tanks ,but I grow increasingly more lazy as I get older, and don't much like cleaning the glass top's each week that were famous for collecting hard water deposit's.
Since providing some floating plant's,,I seldom lose fishes I did in the past from tanks without plant's.
IME Swordtails need long tanks(3 to 4 Ft.) with room to swim back and forth and to help curb aggressive tendencies of males on subdominant males, or females on females .
Swordtail's also seem to do better for me with cooler temps in 74 to 76 Degree's F
Siamese algae eater's, and Swordtails alike, are very active fish and to lose one or two in open top tank would not come as a surprise to me after caring for them since I was in high school.
With activity level's of the larger swordtail's and Siamese algae eater's as they mature,I would expect a lot of darting about if room permit's, and both species along with other species housed with them,,could easily startle one another or other tank mates,and they leave the surface of the water.
I'm presently keeping Swordtail's,Celebs Rainbow's,Turquoise Rainbow's,platy's,corydoras in 80 gal, open top tank, and have lost two fish (sadly celeb's rainbow's),in last six month's.
Hope some of this help's.