i would consider using some sort of filtration, such as a small Duetto or the Whisper terrarium model. They are inexpensive, and the get the job done in shallow water. That way, you really wont have to worry too much about bacterial problems later on. Running the water through carbon too will help greatly. Please condider doing this for the health of your new toads. 
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1.0 ball python- Azazel
1.0 columbian boa- Brooklyn
1.0 red blood python-Hiss
1.0 peach phase thayeri-Sancho
0.1 creamsicle corn- Pandora
0.1 partial stripe ghost corn- Raven
1.0 Sunglow motley corn-Ernie
1.1 hognose- Pricilla and Odd
0.1 russian tortoise- Manja
0.1 collared lizard-O-ren
0.1.1 leos- Boji and Kodama
0.1 beardie- Indie
1.0 BTS- Griffon
0.1 Iggy- Sunny
0.0.2 Red american toadlets with 0.0.7 legs total (er, i have one w/3....)
0.0.1 gray tree frog toadlet
0.0.6 land snails
0.0.2 millipedes of unknown species from TN
0.0.1 spotted slug
5.3 bettas
0.1 pacific parrolet- Mishka
1.1 cats- Cairo and Oberon
2.3 ratties Rizzo, Bounce, Bree, Blitzkreig, and Zelda