Just nit-picking here, I would raise the water level and assuming you have adequate lighting I would add some fast growing stems to the tank as well as some anubias. Fast growing stem plants like bacopa, cardamine, Brazilian pennywort, hornwort and or water sprite will all help to ward off algae assuming of course you don't have incandescent lighting (they produce more heat than light); most fluorescent lighting is adequate for growing plants. Duckweed makes an excellent nutrient sponge but it can block a lot of light from reaching smaller plants (useful if you find you only have a few fast growing plants but are accumulating algae on slower growing plants like anubias/java fern. Endlers and guppys enjoy rather thick surface cover and it also provides refuge for fry.
Protip: watts per gallon is a lie; always go off of wattage and tank depth (water diffuses light rapidly 20W over a 20g long is a LOT more light than 20w over a 20g tall) and flow(current) is the key to preventing BGA. Heavy planting can keep your nitrates on the low side; almost completely removing the need to change water; which is crucial for maintaining CO2 stability and slowing of algae growth.
now, that's a question!
Endlers are endler guppies (just a longer name), however, often you do see crosses between the two in the LFS that actually look like a mix between the two. They are usually bigger and the colours aren't quite endler-y. You'll just need to look at them to know how sure. They should only be about an inch long and look something like this:
You get ones with like "snakeskin" tails etc. they are deffo crosses. And as a side note, it's generally beleived that there are no "pure" endlers left, particularly in most LFS however you do get some that have been more carefully bred for generations from specialist breeders. I know one of my endlers def looks like he's got a little guppy not too far back in his history!
lol I nearly forget I have them too, they do get lost in there - but my hubby likes them so they stay! One thing I do like about them is that they stick to the top of the tank most of the time which is nice for my stock set up, it means I've got a little bit going on in all areas of the tank. Oh, and they are like goats too, constantly grazing on the stuff that none of the other fish want haha.
Thanks a lot! I need to post a new picture of it the plants have grown really well recently