welcome! 

mind to share your picture of the bug-eyed fellow?

NO LA yuck la i dun use my mouth of course lol... I apply a little physics that i learned in form 5.. lol.. before u put the straw in the water, plug/block one end with ur thumb then only put the straw in the water. To suck up the fish poo, release ur thumb and let the atmospheric pressure outside the strw do its work, water and poo will be auto sucked up into the straw - and quickly, while the water is being sucked up halfway thru the straw, immediately block the top end of the straw again to transfer the dirty water and fish poo into another container. After u suction all the fish poo adi then u can throw away the fish poo into ur potted plants lol 

oh you using the syphon method.. your straw has to be pretty long though. for it to work, the outer part of the straw has to be longer than the part inside the water.

*edit - you're not using the syphon method, just realised lol.. well yours will be pretty tedious but it'll work too. the fastest is probably the syphon method which you place those flexible straws, shorter end in the water and longer end outside (with water in the straws also), then release your finger at the outer part of the straw then the water will automatically be sucked out. i use it for my little pond using a short garden hose.
shouldn't be any harm if they bite the tube mah, my fish likes to nibble on my finger cause they're so used to me feeding them with mosquitoes that whenever they see my finger they think i got mosquito for them so they bite lol. and it's not painful, just like normal fish nibble so i doubt that they'll bring any harm to your straws/tube.

I cant use the syphon method for my case, because i dun keep my fishes in a really big jar lol.. i clean my water almost everyday so its not tedious for me:P

lol change the water 1 shot only la, save you the trouble of looking for their poo.

I'm doing 80% WC, except if the betta is the adult size, i will do a full 100% water change once 2 weeks

lol.. i won't go smell my fish bowl cause i know my pond water doesn't smell too well itself. BUT it's clear fresh water, just that got lots of algae in it

i shud have a few MG-CT females to let go.. gotta go home and jar some first. lemme know if you're interested. price starts from RM5x.

i bought a female but die after 2 days don know what happen.. not fin roots.. just not eating and i think she's pregnant bcoz when i show her male her body got come out the mark.. few lines.. but she die so weird...

is vertical... later will going to get another female...

i believe that indicates that ur betta is stressed

wow, nice, gold hmpk, but still not there yet.

yea, rounded claudal, gap between dorsal and claudal (dorsal not overlapping claudal). dorsal and anal of a trad pk but claudal of a show pk...something of a inbetween form.

I am not a pure Betta breeder, i am Guppy breeder.

Below are the guppy i breed,  Albino Full Red.

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Well, to breed a guppy is lot easier than Betta, you know guppy don't spawn eggs. 

Haha, this is what i call poor photo shooter.