Intuos

Welcome to the forum. I'm afraid that the assassin snail won't help with algae as they eat other snails. Your stocking levels are fine and you could add more fish you would just need to keep a close eye on your water parameters and water change as needed. Imo a 10g is a bit small for a hillstream loach, maybe consider getting rid of the assassin snail for a different type of snail like ramshorn or nerite. If you prefer shrimp I would personally go for amano over cherry with a betta.

Temperature is too low as Colu said somewhere in the 24-28 range is best. However in my experience glowlight tetra are not generally the most active swimmers when they feel safe, they do tend to stay in an area and school quite loosely. As long as they are feeding well and water perramiters are good I wouldn't be worried.

I would suggest rummy nose tetras, they are easy to look after and can usually handle a fairly wide range of water perramiters. Plus they are really active and will follow anything outside the tank and in it (I have to be careful when maintaining the tank as they are really inquisitive and sometimes get in the way 😂). In a 20 gallon long you could easily have a good size group of 12-18.

Nice looking tank, have you considered adding some floating plants (just not duckweed 😂)

Do you have access to cycled media (another tank, friend or lfs) to try and kick start the cycle again. Or maybe try something like fluval Cycle or api quickstart along with 50% daily water changes. Floating plants like dwarf water lettuce can also help with water quality as they are fast growing and in my experience bettas love swimming around in roots.

My newest addition, have been waiting for a month to get him while he went through quarantine at my lfs.

For me personally 7 tanks is where I have found a good balance. I do maintenance on 1 a day spending anywhere from 15-60 minutes depending on what needs doing. Have had more in the past but found it started to feel more like a chore than a hobby.

Try adding some of your seeded media to the tank in contact with your substrate and hard scape it should help get the bb get established.

Favourite fish to keep depending on tank size Nano tank - chili rasbora as you can have a lot in a small tank and get great colours and activity. Mid size - rummy nose tetra because they are constantly moving all over the tank and ime are very inquisitive when you are near the tank. Large size - Discus I just love the variety of colours. Breeding it has to be guppies the fact you can mix the strains so easily and try to create something new. For enjoyment has to be betta they have so much personality and are very engaging.

I always use mesh bags to create a base layer to build on filled anywhere from half to three quarters full. Then fill in the gaps with the final substrate to prevent trapping any air. I find this results in a really stable platform to then build my scapes on.

https://www.google.com/aclk?sa=L&ai=DChcSEwipo4DFoZL3AhWV7u0KHYnkDQ4YABANGgJkZw&ae=2&sig=AOD64_3KDC8WybujID5WXqVOEeQ3mMTzAg&ctype=5&q=&ved=2ahUKEwiFjfXEoZL3AhVFgFwKHfKtBN8Qwg96BAgBEAs&dct=1&adurl=

I'm UK based as well, try searching for EGONDIS 35 Litre Rimless Low Iron Glass Aquarium Tank on amazon, depending on your budget these are OK.

That is a type of of anubias not sure what one though. It's not suitable for planting into gravel as the rhizome will rot.

If you like apistogramma have you considered kribensis when fully coloured up they are really beautiful fish and in my experience they tend to peaceful in a community tank. Fish that I think work well with them would be something like cherry barb or neon green rasbora.

I am looking for some terrestrial plants that I can use with the roots submerged and was looking for some suggestions. I have the problem that due to allergies I cannot use ferns, monstera or lilies. Can anyone help?