Board Thread:Questions and Answers/@comment-28616233-20161231003213/@comment-30336302-20170102051134

Qwertyxp2000 the second wrote: The foam does disappear, but it remains on the track for a very long time before being used. And many towers can replace 2/3 anyway...Examples? Of course the foam will disappear, I mean that it won't be affected by the no. of bloons.

Examples: 3/0 tack shooters, 1/2 subs, x/3 dart monkeys, 0/0 dartling gun or dart monkeys...etc.

However, 2/3 engis are still a good choice for spamming to pop MOAB class bloons

P.S.: If you want foam, 3/0 is alright, 3/2 is a waste of money if you just need the spamming of sentries and/or the foam.